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Technical Bulletins - Page 1 - TS 77-1 thru TS 80-1

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H U D S O N

Technical Information Bulletins

Page 1

TS 77-1 thru TS 80-1

The Technical Bulletins included in this file were produced by Art Adams at the time, in the mid- to late- 1970's, he was editor of the Hudson-Essex-Terraplane Club magazine, "The White Triangle News". Art inserted these bulletins with material that was taken from various sources into the WTN as center folds, easily removed to be saved in a technical bulletin notebook.

Vol. 2 and Vol. 3 are bulletins I made up from 1994 to the present, from material I accumulated during the writing of my "General Information Handbook", using Art's format as a tribute to Art's work.

NOTE: This web page is searchable - click on "Edit" in the tool bar, then "Find In This Page", then type in the bulletin number in the box. Then click on "Find".

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Technical Bulletin Index

HUDSON MOTOR CAR COMPANY

DETROIT, MICH., U.S.A.

TECHNICAL BULLETIN INDEX - Volume I

.

I. Hudson Technical Information Bulletins

TS 77–1 - 1948–1954 Dual Headlight Relay

TS 77–2 - Exhaust Manifold Damper

TS 77–4 - 1948–1954 Cylinder Head Temperature Indicator Elements

TS 77–7 - Hudson Double Safe Hydraulic Brakes

TS 77–9 - Proper Clutch Flushing and Lubrication

TS 77–11 - Aluminum Cylinder Heads

TS 77–14 - 1932 Essex–Terraplane Service Hints

TS 77–15 - 1948–1956 Six Cylinder Head Gasket

TS 77–16 - 1948–1954 All Hudson Heater Core and Hose Connections

TS 77–17 - 1940–1957 Hudson Spark Plug Recommendations

TS 77–18 - 1955–1956 Eng. Coding for Bore and Main and Connecting Rod Bearings

TS 77–19 - 1928 Hudson Information Models "O" and "S"

TS 77–20 - 1946–1954 Fuel and Temperature Dash Units

TS 77–21 - 1950–1954 Hudson Exterior Body Lacquers & Codes

TS 77–22 - 1948–1954 Front Seat Position All Models (except Jet)

TS 77–23 - 1948–1949 Hudson Body Lacquers & Codes

TS 78–1 - 1948–1954 All Models – Check Perimeter Frame

TS 78–2 - 1948–1954 Center Steering Pivot Pin Replacement

TS 78–3 - 1948–1954 Valve Adjustment

TS 78–4 - 1950–1954 Exterior Body Lacquers & Code – 1950–1954

TS 78–6 - 1940–1942 Chassis Model Information

TS 78–7 - 1942–1954 Speedometer Lubrication

TS 78–8 - 1930 Hudson Trimming Specifications for 1930 Models

TS 78–9 - 1946–1947 Model Information

TS 78–10 - 1940–1954 Headlight Mounting Ring & Housing Interchangeability

TS 78-14 - 1948-1954 Model Information

TS 78-15 - 1939 Model Information

TS 78-17 - 1938 Model Information

TS 78–21 - 1948–1956 Engine Information, Six Cylinder (except “202”)

TS 78–22 - Essex – Installation of Hot Water Heater in Models with Thermo–syphon Cooling

TS 78–24 - 1948–1954 Rear Axle Identification and Usage

TS 78–25 - Drive–Master Service Hints

TS 80–1 - 1924–1936 Hudson Built Cars, Year Models by Serial Number

TS 81–1 - Check the Starter Solenoid

TS 81–3 - Body Painting and Preparation

TS 81–4 - 1946–1954 – Model Year Production Numbers

TS 84–2 - Rebuilding the Water Distribution Baffle – 3 x 5 Six Cylinder Engine

____________________________________________________________________________________________

TS 77-1 - Dual Headlight Relay

HUDSON MOTOR CAR COMPANY

DETROIT, MICH., U.S.A

TECHNICAL SERVICE BULLETIN

TS 77-1
File Under: ELECTRICAL

ALL HUDSON OWNERS, 1948-54 MODELS
DUAL HEADLIGHT RELAY

Reports from the field indicate that after twenty years or so of service it is not uncommon for the headlight switch to fail or the circuit breaker to cut the headlights off without warning.

The installation of a dual headlight relay will save the headlight switch and result in brighter headlights because there will be less voltage loss between the battery and the headlights.

The relay is installed between the headlights and the dimmer switch at a point close to the battery. When in operation the current flows directly from the battery through the relay to the headlights. It only takes a small amount of current to activate the relay; as a result the light switch does not
become overloaded causing the circuit breaker to cut out.

Very truly yours

A. E. Adams
Technical Service Editor

______________________________________________

TS 77-2 - Exhaust Manifold Damper

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A. TECHNICAL SERVICE BULLETIN

TS 77-2
File Under; ENGINE

All Hudson Owners
Exhaust Manifold Damper

This article from the Hudson Service Merchandiser dated May 1952, is reproduced with the thought of emphasizing this point also for the benefit of any new men in the service field.

Perhaps no other important part of a gas engine is overlooked or neglected as much as the Exhaust Manifold Damper.

Although the Exhaust Manifold Damper Shaft is of a heat-resisting steel, it sometimes sticks or becomes so tight due to carbon build-up that the springs, thremostat or counter-weight will fail to move it.

When the damper action become sluggish or sticks, the results are a very slow warm-up and poor performance in winter if stuck at the "heat off" position.

If stuck at the "heat on" position and the atmospheric temperature is high, engine power falls off and performance becomes sluggish. A sharp, responsive Exhaust Manifold Damper is important and accentuates engine tuning.

Should the Damper Shaft be found to be stuck, remove the thermostat and springs, apply penetrating oil or kerosene and tap the shaft for end play to break the carbon and corrosion. The shaft should not be oiled. When properly freed, carefully check springs and thermostat before installing and replace them if weak.

Very truly yours,

A. E. Adams
Technical Service Editor

______________________________________________

TS 77-4 - Cyl. Head Temp. Indicator Elements

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-4
File Under; ENGINE
March 1977

All Hudson Owners, 1948-1954
Cylinder Head Temperature Indicator Elements

     When installing a 1951-54 type engine, 6 cylinder or an 8 cylinder head or engine in a 1948-50 car, the cylinder head must be modified to accomodate the car's original equipment type temperature Indicator element.

     Redesigned gauges were used starting with the 1951 models which operate on a constant potential of 6 volts and require a different cylinder head element from that used on previous models. The newer element is 1/4" pipe thread diameter and is shorter than the 3/8" pipe part used on the earlier models, which necessitates drilling and tapping the new cylinder head. If the proper cylinder head element is not used, incorrect gauge readings will result.

     To install the original element in the new cylinder head, the hole in the left side of the head must be enlarged from 1/4" pipe diameter to 3/8" pipe size by drilling out the opening with a 37/64" drill and retapping with a 3/8" pipe tap. On six cylinder engines the location of this element is changed from the front of the head to the rear, which will require shortening the wire slightly to correspond.

Very truly yours,


A. E. Adams ,
Technical Service Editor

______________________________________________

TS 77-7 - Double Safe Hydraulic Brakes

HUDSON MOTOR CAR COMPANY

DETROIT, IT. MICH., U. S.A.

TECHNICAL SERVICE BULLETIN

TS 77-7

File Under: TIRES, WHEELS, HUBS

BRAKE SYSTEM

March 1977

ALL HUDSON OWNERS

HUDSON DOUBLE SAFE HYDRAULIC BRAKES

One of the exclusive Hudson safety factors for many years has been a brake design that brings the mechanical brake into operation when the brake pedal has been depressed beyond the point where the hydraulic brakes become effective.

In order that this mechanical follow up becomes effective properly when the brake pedal has reached a predetermined point, it is necessary that. the mechanic who makes the final brake adjustment knows definitely where to check and what the proper adjustment should be.

When the brakes are relined or taken up (at which time the hand brake should always be reset) the mechanical safety follow up clearance should he carefully chocked and the necessary correction made very accurately.

When the clearance at the point of "take up" as shown in the following sketches is accurately made and should the hydraulic brakes fail for any reason the mechanical brakes will function in a normal manner as the brake pedal movement and pressure are continued downward.

All mechanics who have to do with brake work should understand how to this adjustment properly. Complete instructions will be found in the Hudson Mechanical Procedure Manuals.

It will be noted that the adjustment for mechanical brake engagement shown in the sketches above differs somewhat due mainly to the change in design of various models. Adjust at "A" to obtain clearance at "B".

In addition to checking the mechanical follow up it is imperative that the brake lines be chocked periodically. There is danger of sudden leakage of brake fluid if the lines rust out or are otherwise damaged. If the condition of the brake system is unknown it should be checked over at the first opportunity. A complete check-up would include the wheal cylinders, brake drums, brake lining, flexible and steel hydraulic lines, master cylinder, and the mechanical linkage and cables to the rear wheels.

It is recommended that the hydraulic brake system be checked for damage or leakage whenever the car is lubricated.

Yours very truly

A. E. Adams

Technical Service Editor

Reference: Hudson Service Merchandiser, March Sept 1950.

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TS 77-9 - Proper Clutch Flushing & Lubrication

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-9
File Under; Clutch, Transmission
Propellor Shaft

All Hudson Owners Using Fluid Cushioned Clutch

Proper Clutch Flushing and Lubrication

Following is the method recommended in the Hudson Service Merchandiser, dated Dec., 1951, for draining and cleaning the clutches of Hudson cars (thru 1954, except Jet) in order to remove gum and oxidation deposits which cause clutch sticking.

It is important that this procedure be closely followed and the engine run sufficiently to warm up the clutch parts to approximately 100 degrees before flushing. If the parts are at a low temperature, the solvent will not be effective and, on the other hand, if the temperature is too high, much of it will vaporize.

Procedure

1. Remove the flywheel pan.

2. Turn the flywheel until drain plug is at its lowest position. Remove plug and drain out the old clutch compound.

3. Turn flywheel until clutch filler hole is opposite timing opening in rear engine plate and with a filler gun, inject one pint of solvent. (20% carbon tetrachloride and 80% commercial acetone - NOTE: In light of this directive being written in 1951 carbon tetrachloride may no longer be available - a suitable substitute will probably have to be found.)

4. Replace pug and with a stick of the proper length or clutch pedal depressor, hold clutch in disengaged position. With engine at rest, permit clutch to remain disengaged for about 10 minutes. Release pedal and turn flywheel and clutch by had approximately 1/4 turn, remaining in this position for another 10 minutes. Repeat this operation, depressing clutch pedal and turning flywheel 1/4 turn each time until a complete revolution is made. This will give the solvent the opportunity to act on all the internal clutch parts.

5. Drain clutch again making sure filler opening is at extreme bottom position to remove all solvent. Turn flywheel until filler opening is again exposed at the rear engine support plate. Introduce 1/3 pint of new Hudsonite compound and replace plug.

6. Replace flywheel cover.

Yours very truly,

A. E. Adams
Technical Service Editor

Reprinted from The WhiteTriangle News,
a publication of the Hudson-Essex-Terraplane Club, Inc.

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TS 77-11 - Aluminum Cylinder Heads

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-11
File Under: Engine

All Hudson, Essex and Terraplane Owners
Aluminum Cylinder Heads

The following information from the Hudson Service Merchandiser of November, 1953, should be of interest to all who are using aluminum cylinder heads.

With the first use of aluminum cylinder heads on gas engines, it was found that unless proper precautions were taken, there was danger of corrosion between the cylinder head and studs which made it difficult to remove the head.

To prevent such corrosion, an application of an anti rust oil was applied on all the cylinder head studs. The cylinder head gasket with copper ferrules around the water passageway holes was also replaced with one having specially treated steel ferrules.

It was definitely proven that the more alkaline the water used in the cooling system, the greater the tendency of corroding around the cylinder head studs. This was particularly severe if there was any water leak from the cooling system reaching the studs.

To prevent any difficulty in removing cylinder heads due to corrosion, any time the cylinder head is removed and before installing, give all studs or cap screws a coating of special oil to prevent corrosion, such as SOHI CYL #300. Avoid the use of alkali water in cooling system and always use suitable inhibitor in cooling system water, especially important when engine is fitted with an aluminum cylinder head.

In some instances, there is evidence of erosion or grooving, on the machined face of an aluminum cylinder head which generally takes place between a cooling water passageway and a combustion chamber. This is the result of the cylinder head not having been kept properly tightened, thus permitting a cross leak of water and steam

Yours very truly,

A. E. Adams
Technical Service Editor

Reprinted from The White Triangle News
Publication of the Hudson-Essex-Terraplane Club, Inc.

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TS 77-12 - Valve Adjustment - 1948-1956 Six, 1948-1952 Eight

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-12
File Under: ENGINE

May 1977

ALL HUDSON OWNERS, 1948-56 MODELS

VALVE ADJUSTMENT, 1948-56 SIXES, 1948-52 EIGHTS

The following procedure may be used to adjust valves or replace manifold gasket:

I. 1948-54 Hudson Sixes and 1948-52 Hudson Eight's
     1. Remove right hand front wheel.
     2. Remove fender side shield with side shield extension.
     3. Remove valve covers and breather pipe.
     4. Adjust tappets:

	Six Cylinder	Eight Cylinder
Intake Exhaust	.010" (Hot) (For Cold Clearance .012" (Hot) see 1955)	.008" (Hot) .010" (Cold)

II. 1955-56 Hornet 6 Cylinder and 1955-56 Wasp with Twin-H-Power
     1. Remove 5/8" nut from top on front engine supports and loosen the rear engine supports.
     2. Disconnect fuel and vacuum lines to carburetors and intake manifold.
     3. Disconnect throttle linkage. (Leave carburetors mounted.)
     4. Remove exhaust pipe at attaching point to engine manifold.
     5. Remove all manifold to engine attaching nuts and clamps.
     6. Place a porto-power or suitable jack between front and right hand corner of cylinder block or on water pump casting and just below the upper wheelhouse to wheelhouse crossmember and the wheelhouse panel. Exert pressure to move the engine upwardly and to the left (viewed from driver's seat). This will provide needed clearance to remove the engine intake and exhaust manifold assembly. Sufficient movement in cooling hoses will permit movement without draining the cooling system.
     7. Remove valve compartment covers.
     8. Remove spark plugs.
    9. With distributor timing set at T.D.C., attach a small six-volt light bulb (12 volt in 1956) in parallel to the breaker point terminal on the distributor housing and engine for ground. Attach the coil secondary lead to ground (remove from distributor cap). With ignition switch on, light will burn when distributor points separate to fire a cylinder.

   10. Start with No. 1 cylinder and adjust valve lash (Cold) to the following clearances:

Engine	"202"	1955 "308"	1956 "308"
Intake Valves Exhaust Valves	.012" (Cold) .016" (Cold)	.012" (Cold) .019" (Cold	"0" Lash (Non-Adjustable hydraulic lifters were original equipment.)

III. 1955-56 Wasp Hi-Torque 6

Clearance permits removal of the manifold without movement of the engine, other operations as listed above.
It should be pointed out that the 1952 Hudson Mechanical Procedure Manual has the correct valve lash readings. The 1954 Supplement is correct only as it pertains to the "202" engine. Other published sources often give incorrect clearances.

Yours very truly,

A. E Adams
Technical Service Editor

See TS 78-3 - Valve Adjustment
References: 52 HMCC Manual
AMC Ltr 7Apr55
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TS 77-13 - 1930 Hudson & Essex Trim Specs.

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U. S. A.

TECHNICAL SERVICE BULLETIN

TS 77-13
File Under: Body & Frame

May 1977

All Essex Owners
1930 Essex Trimming Specifications

The following trim specs for 1930 models may be of interest to all restorers of Essex built cars from this year

1930 Essex Models
	Color	Material	Manufacturer	Mfg.'s No.
Essex Brougham Headlining Side Walls, Door Panels, & Backs of Front Seat Seat Cushions, Backs Carpet Windlace Curtains	Wood Wood Wood Gray H. P. Beige Gray	Napped Cloth Velcour Velcour Velcour Imit. Leather Rex No. 3	Carolina C & W Mills E. F. Timme & Sons Collins & Aikman C. H. Masland & Sons . . . . . . . . . . . . . . . Adams & Westlake Company	2515 533 V76C 283VVRA 1763 . . . . . . . . . .
Essex Coach Headlining Side Walls, Door Panels, & Backs of Front Seat Seat Cushions, Backs Carpet Windlace Curtains	Gray Gray & Taupe Taupe Gray H. P. Gray Gray	Napped Cloth Velour Velour . . . . . . . . . . Napped Cloth Rex No. 3	Carolina C & W Mills E. F. Timme & Sons E. F. Timme & Sons C. H. Masland & Sons Carolina C & W Mills Adams & Westlake Company	1235H 1255 1256 . . . . . . 1235H . . . . . .
Essex Coupe Headlining Side Walls & Door Panels Curtain Seat Cushions, Backs Carpet (Rumble Seat) Windlace	Fawn Gray Mottled Fawn Gray Gray Striped Fawn Gray Mottled Gray	Napped Cloth Velour . . . . . . . . . Velour . . . . . . . . . Napped Cloth	Carolina C & W Milles E. F. Timme & Sons Curtain Supply Company E. F. Timme & Sons W. J. Sloane Carolina C & W Mills	1235H S1184 3S23 V75C 1235H 1235J
Essex Phaeton Seat Cushions Door Panels, Side Walls, Seat Arms, etc Carpet	Tan Tan Wood	Leather #1 D. B. Imit. Leather . . . . . . . . . . . .	American Oak Leather Co. . . . . . . . . . . . . . . . C. H. Masland & Sons	970 . . . . . . v76C
Essex Roadster Front Seat Cushions, Bac Rumble Seat Cushions Back Side Walls, etc. Carpet	Tan Tan Tan Wood	Leather No. 1 D. B. Imit. Leather Imit. Leather . . . . . . . . .	American Oak Leather Co. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C. H. Masland & Sons	970 . . . . . . . . . . . . V76C
Essex Standard Sedan Headlining Side Walls, Door Panels, & Backs of Front Seats Seat Cushions & Backs Carpet Curtains	Gray Mottled Gray Gray & Taupe Gray Gray	Napped Cloth Velour Velour . . . . . . . . Rex #2	Carolina C & W Mills E. F. Timme & Sons E. F. Timme & Sons C. H. Masland & Sons Adams & Westlake	1235H 125 125 V76C . . . . . . .
Essex Sun Sedan Seat Cushions & Backs Door Panels & Side Walls Carpet Windlace	Gray & Black Mottled Gray & Black Gray Gray & Black	Leather No. 1 D. B. Imit. Leather . . . . . . . Imit. Leather	Cleaveland Tanning Company Textile Leather Company C. H. Masland & Son . . . . . . . . . . . . . . . .	1801-91 4B954 V76C . . . . . .
Essex Touring Sedan Headlining Side Walls, Panels & Backs of Front Seats Seat Cushions & Backs Carpet Windlace Curtains	Wood Wood Wood Wood Beige Gray	Napped Cloth Velour Velour Velour Imit. Leather Rex No. 3	Carolina C & W Mills E. F. Timme & Sons E. F. Timme & Sons C. H. Masland & Sons . . . . . . . . . . . . . . . . Adams & Westlake	1235HOO 1250 1251 V76C . . . . . . . . . . . . . .

NOTE: See TS 78-8 for Hudson Trimming Specifications

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TS 77-14 - Essex-Terraplane Service Hints

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

                                                                                                                           TS 77-14
                                                                                                                           File Under: Service General

                                                                                                                           July 1977

ALL ESSEX-TERRAPLANE OWNERS - 1932 MODELS
ESSEX-TERRAPLANE SERVICE HINTS

CLUTCH PEDAL CLEARANCE: The clutch linkage should be adjusted so that the clutch pedal can be moved down from its normal disengaged position 1½" before the clutch linkage is operated. This measurement should be taken by pulling the clutch pedal down from the toeboard and measuring 1½" from the toeboard down to the rubber biscuit. This clearance is adjusted by changing the position of the yoke on the clutch pedal to cress shaft lever rod.

IGNITION TIMING: The ignition timing is set in factory production to a mark on the flywheel which is 3/4" ahead of dead center position. This is done in anticipation of wear on the distributor arm block, which will retard the ignition. You will find that with the standard head and Ethyl fuel you will be, able to maintain best performance by setting the timing near the mark, which is 3/4" ahead of dead center; while with standard gas in a standard head and Ethyl gas in the Super Power Dome head it will be necessary to retard the spark nearer to the dead center position to prevent excessive detonation. All ignition timing setting should be checked by road test.

REAR WHEEL PULLER: Do not under any consideration use a "knock-out" type of wheel puller, or strike the end of the Essex-Terraplane axle shaft with a hammer, as this throws an excessive load on the thrust spacer and differential gear pin.

WHEEL HUB CAP: It is recommended that a small amount of grease be put on each of the hub cap retaining springs to prevent squeaks from a slight motion which may develop between tire hub cap and the hub.

TIRE PRESSURE: The tire pressure recommended are 28 lbs. front and rear for average driving and 36 lbs. front and rear for high speed driving. This recommendation supersedes the one carried in Instruction Books and on wind-shield stickers and will be found to be much more desirable from a standpoint of comfortable riding. Front tire pressures must be equal.

HORN WIRE LOCATION: In order to relieve the ignition circuit of the comparatively heavy amperage drawn by the horn, it is recommended that the horn to ignition coil wire be shortened and reconnected fro the horn to the terminal on the starting motor.

WTN TECHNICAL SERVICE

(From 9 AUG 1932 Hudson-Essex Service Bulletin)
    Reprinted from The White Triangle News
    Publication of the Hudson-Essex-Terraplane Club, Inc.

TS 77-15 - Cylinder Head Gasket

HUDSON MOTOR CAR COMPANY
DETROIT, MICH. U.S.A.

CABLE ADDRESS
H UD S O N C A R

TECHNICAL SERVICE BULLETIN

TS 77-15
File Under: Engine

All Hudson Owners - 1948-1956 Six Cylinder
Cylinder Head Gasket

Some reports from the Field relative to difficulty with blown cylinder head gaskets prompts us to bring attention to the following article presented in the February 1953, Hudson Service Merchandiser.

Perhaps one of the most critical points in connection with the present stepped up compression and highly stressed engines is that of the cylinder head gasket seal.

Whe a cylinder head has been removed for any reason, there is much in the care exercised in the installation that will have to do with preventing a blown cylinder head gasket.

With the use of a straight edge, a careful check should be made of the top face of the cylinder block for bulge or slightly raised metal around stud holes. Such raised points may be dressed off with a fine mill file. A cylinder head that is warped in excess of .010, should be milled or planed off just sufficient to clean up over the entire surface.

Examine the cylinder head gasket for any broken spots; also check for all water hole alignment. Carefully wipe off both cylinder head and cylinder block face with a clean cloth. Cap screw threads must be clean and turn freely in threaded block openings. Use two J-2969 Locating Studs to properly position the gasket and cylinder head.

The cylinder head gasket has been treated by the manufacturer with an effective sealing agent. However, Hudson Perfect Seal Gasket Paste, Part No. 164848, may be used with out detrimental effect on this sealer.

Proper tightening of the cylinder head is very important and this alone can determine the success of a cylinder head gasket holding as it should. Following is recommended iinstallation tightening procedure for the aluminum cylinder head.

Illustrated below is an order of tightening. The initial tightening should be very gradual, going over all cap bolts three or four times until the torque wrench indicates a uniformity of 75 to 80 foot pounds.

The engine should be idled slowly until it reaches normal operating temperature when all cap bolts should be re-tightened to 75 to 80 foot pounds. Run engine again until it reaches normal operating temperature - this time allow it to cool - and again torque all cap bolts to 75 to 80 foot pounds in order shown in the illustration.

It is improtant to again re-tighten a cylinder head after 800 to 1000 miles. An aluminium or cast iron cylinder head should be tightened to 75 to 80 foot pounds - - COLD.

Yours very truly,

A. E. Adams
Technical Service Editor

______________________________

TS 77-16 - Weather Control Core & Hose Connections

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-16
File Under: ENGINE COOLING
& WEATHER CONTROL

July 1977

ALL HUDSON OWNERS, 1948-54 MODELS

WEATHER CONTROL CORE AND HOSE CONNECTIONS

Beginning with series A production the Weather Control core and hose connection arrangement was identical to that of the 500 series. On September 12, 1950, after a total of 539 cars - Model 4-A with Weather Control and Weather Control with Remote
Control, also series 5A-6A-7A-8A with Weather Control and Remote Control, the radiator core thickness was changed from 3.12 inches, part number 166736, to 3 inches, part number 305233.

With this new core, the inlet hose (from Ranco valve) must be connected to the LOWER heater core tube and the outlet hose (to the water pump) to the UPPER tube. This is just the reverse of the manner of connecting to the former heater core. Shown in the illustration below are the former and present methods of connections.

The air vent has been eliminated from, the new heater core upper tank and it is therefore very important that connections be made correctly to avoid possibility of air trap resulting in impaired heating efficiency,

Connections at the Ranco Heat Valve are the same as heretofore. Should the connections here be reversed an occasional noise in the heater is apt to result due to balanced pressure caused by thermostat effort. on one side and water flow resistance on the other side of the poppet type valve.

                                                                                                     Yours very truly

                                                                                                     A. E. Adams Technical
                                                                                                     Service Editor

Reference: Hudson Service Merchandiser December,
1950 & February, 1953

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TS 77-17 - Spark Plug Recommedations - 1940-1957

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-17
File Under; ENGINE

July 1977

ALL HUDSON OWNERS, 1940-1957 MODELS
SPARK PLUG RECOMMENDATIONS

    The following spark plugs are factory recommended for average operating conditions. If the car is Operated under conditions resulting in consistently high engine temperatures, a colder plug should be used. If the car operates under conditions resulting in consistently low engine temperature, a hotter plug may be indicated.

Spark Plug                                                                             For Models
Champion J-7 - 1940-47, All Models with Standard Cylinder Head. (Formerly J-9)

Champion H-8 - 1948-50, All Models, 1951-52, Models 4A, 5A, 6A, 8A, 4B, 5B, 6B, 8B.

Champion H-10- 1946-47, All Eight Cylinder with Aluminum Cylinder Head,
                            1953-54, Models 1C, 2C ,4C, 5C, 1D, 2D, 3D, 4D,
                            1955-56 Wasp
                            1955 Hornet V-8 Beginning with Engine #P-1001 and Prior to Engine #P-6001.

Champion H-11 - 1951-56 All Hornet Six Models,

Autolite AG-5 - 1955 Hornet V-8 beginning with Engine #P-0001, Prior to Engine #P-0500 and beginning with #P-6001.

Champion N-18 - 1956 Hornet V-8

AutoLite AG-7 - 1956-57 Hornet Special V-8,

Yours very truly,

A. E. Adams,
Technical Service Editor

______________________________

TS 77-18 - Engine bore, main bearings and con rod bearing codes

HUDSON MOTOR CAR COMPANY

DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-18

File Under: ENGINE

July 1977

ALL HUDSON OWNERS USING 1955-56, "308" & "202" ENGINES

ENGINE CODING FOR SIZE OF BORE, MAIN BEARINGS,
AND CONNECTING ROD BEARINGS

An ABC code was effective after Engine Number F-2814 and M-3616. 1955 Hudson Hornet "308" and Wasp "202" engines to identify oversize cylinder bores or undersize crankshaft bearings. The code follows the Engine Number. Engines that are not marked are standard in all respects. The letters are decoded as follows:

                                   First Letter             Size of Bore
                                     Second Letter         Size of Main Bearing
                                     Third Letter             Size of Connecting Rod Bearing

                                     Letter "A"                 Standard
                                     Letter "B"                 .010" Undersize
                                     Letter "C"                .010" Oversize
                                     Letter "D"                 .001" Undersize

     For example, an engine with standard bore, standard main bearings, and 010" undersize connecting rod bearings is coded "AAB". With .001" undersize crankpin, it would be coded "AAD".

     Where oversize bores are listed, all bores are plus .010".

    The main bearing journals, crankpins, or both may be minus .010". In the case of .001" undersize, one or more bearings may be used.

   In no case will an individual engine have oversize bores arid undersize crankshaft journals.

Yours very truly

A. E. Adams
Technical Service Editor

Reference:
AMC Letters dated 17 Mar 55 and 30 Jun 55

______________________________

TS 77-19 - 1928 Hudson Info - All Models

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-19
File Under; ENGINE

All Hudson Owners, 1928 Models
1928 Hudson Information, Models "O" & "S"

Engine: 6 Cylinder. bore 3-1/2", stroke 5" Piston Displacement: 288 cu. in. Firing Order: 1, 5, 3, 6, 2, 4. Spark Plugs: Metric, gap .028" Contact Points: Opening .020" Valve Tappet Clearance: Intake .004" to .006" Hot. Exhaust .006" to .008" Hot. Oil Reservoir and Troughs, holds 9 qts., Reservoir only, 7 qts. Fan Belt: "V" Type. Cooling System: Capacity 5½ gals. Gasoline Tank: Capacity 19 gals. Storage Battery: 6-V, 15 plate	Transmission: Fill to level of filler plug on right side of case. Rear Axle: Fill to level of filler plug in housing cover. Clutch: '/4 pint mixture of 1/8 pt light motor oil & 1/8 pt kerosene Brakes: Drums 14" dia., front and rear. Internal expanding shoes 2" wide. Springs: Ft, 39" long, 2'/4" wide; Rear, 57-11/16" long, 2-1/4" wide Spring Bolts: Rear spring front end bolt 3/4' diameter, shackle bolts 11/16" diameter. Tires: 31 x 6.00", Balloon, Inflate Front tires 35 lbs., rear tires 38 lbs. Lamp Bulbs: 6-v, double filament, 21 cp each filament; dome, side, and instrument lights, 6-v, 3 cp, single contact; stoplight 6-v, 15 cp, single contact. Storage Battery: 6-volt, 15 plate
	MODEL "O"	MODEL "S"
WHEELBASE TURNING RADIUS ROAD CLEARANCE REAR AXLE, Gear Ratio WEIGHTS: Coupe Coach Sedan (Standard) Victoria Landau Sedan 7-Passenger Sedan	127-3/8" 21 Feet 8-1/4" 4-5/11 to 1 . . . . . . . . . . . . . . . . 3729 Lbs. 3710 Lbs. 3780 Lbs. 3945 Lbs.	118-1/2" 20 Feet 8-1/4" 4-1/12 to 1 3525 Lbs. 3575 Lbs. 3645 Lbs. . . . . . . . . . . . . . . . . . . . . . . . .

SPEEDOMETER & VACUUM TANK supplied by
Stewart-Warner, Chicago, Ill.
BATTERY., The Electric Storage Battery Co., Philadelphia, Pa.
GASOLINE GAUGE, King-Seeley Corp., Ann Arbor, Michigan.
STARTING MOTOR, GENERATOR, DISTRIBUTOR,
IGNITION COIL AND SWITCH, The Electric Auto-Lite Co.,
Toledo, Ohio.

HORN, E. A. -Laboratories, Inc., Brooklyn, N. Y.
CARBURETOR, Marvel Carburetor Company, Flint, Michigan.
WINDSHIELD CLEANER, Trico Products Company, Buffalo,
N. Y.
STABILATORS, J.W.Watson Co Phila. Pa.
TIRES, Goodyear or Miller Tire Co., Akron, Ohio.

WTN TECHNICAL SERVICE

______________________________

TS 77-20 - 1946-1954 Fuel & Temp. Units

HUDSON MOTOR CAR COMPANY
DETRIOT, MICH., U. S. A.

TECHNICAL SERVICE BULLETIN

TS 77-20
File Under: Instrument Panel & Radio

August 1977

All Hudson Owners - 1946-1954 Models
Fuel and Temperature Dash Units

Listed below are the fuel and temperature dash units, also their corresponding sending uints that are mounted on the fuel tank or cylinder head.

Model	Mfg.s Dash Unit	Part No.	Color	Function	Sending Unit	Voltage Regulator
1946-1947 1946-1947 482-84; 492-94 482-84; 492-94 (1st) 491-91; 481-83 (1st) 491-93;481-83 (2nd) 491-93 (2nd ) 491-93 1950 1950 1941-53 (exc. Jet) 1941-53 (exc. Jet) 1953-54 Jet 1953-54 Jet 1954 (exc. Jet) 1954 (exc. Jet)	209028 209029 213207 213208 213202 213203 217154 217156 220791 220790 225948 224928 236976 236966 241382 241383	41050 41053 42135 42140 42120 42125 42741 42743 42916 42918 45674 45675 46193 46197 --- --	Black & White Black & White Black & White Black Black Black Black Green Green Black Black --- ---	Fuel Temp Fuel Temp Fuel Temp Fuel Temp Fuel Temp Fuel Temp Fuel Temp Fuel Temp	159110 159058 302709 159058 302709 159058 302709 159058 302709 159058 304503 304502 308508 304502 304503 304502	None Required None Required None Required None Required None Required 226575 (45677) 236977 (46283) 241385 241384

When required, only one votage regulator is used for both fuel and temp gauges. The number given in parenthesis under "Regulator" column is the manufacturers
number for the part listed above.

Yours Very Truly,

A. E. Adams
Technical Service Editor

______________________________

TS 77-21 - 1950-1954 Exterior Body Lacquers & Codes

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-21
File Under: Body & Frame

August 1977

All Hudson Owners, 1950-1954 Models
Exterior Body Lacquers & Code

NAME	CODE	MODELS	NAME	CODE	MODELS
Ebony Black Bright or Rocket Red Twiligh Gray - Opal. Gray Mist - Opal. Oriental Green - Opal. Peacock Green - Opal. Texas Tan - Opal Revue Red - Opal. Golden Gray - Opal. (Light) Golden Gray - Opal. (Dark) Lagoon Blue - Opal. Legion Blue - Opal. Cornish Cream Rivard Blue Deep Marooon - Opal. Bali Blue Riviera Blue Field Gray - Opal. Hawaii Greein - Opal. Dark Maroon Pacific Blue Northern Gray - Opal. Newport gray - Opal. Jefferson Green - Opal. Naples Green - Opal. Toro Red (Light) Dark Platinum - Opal. French Gray Neptune Blue Greenn - Opal. Burgundy Maroon	5 21 23 24 25 26 27 28 29 30 35 36 37 38 44 45 46 48 49 48 59 60 61 62 63 64 66 72 82 83	All 1949-50 1950 1950 1950 1950 1950-53 1950 1950 1950 1950 1950 1950-51 1950 1950 1950-51 1950 1950 1950 1950-51 1951 1951 1951 1951-52 1951-52 1951-53 1951 1951-52 1951 1951	Corinthian Cream Admiral Blue Boston Ivory Symphony Blue Green (Light) Jupiter Gray Broadway Blue Southern Blue Gulf Green Symphony Blue Green (Dark) Pearl Gray - Opal. Meadow Green - Opal. Surf Green Robins Egg Green Honey Cream Blue Grass Green Seal gray Beret Blue - Opal. Silver Blue Clair Blue Spring Green Pacific Blue Green Palm Beach Grean Pasture Green - Opal. Roman Bronze Coronation Cream Royal Red Algerian Blue - Opal. Green Gold Lipstick Velchrome	85 87 92 93 95 96 97 115 123 128 132 133 134 135 136 137 158 159 160 161 162 163 164 165 166 167 168 181 182	1951 1951 1952 1952 1952 1952 1952 1952 1952 1953 1953 1953 1953 1953 1953 1953 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954

Two Color Combinations for these models will be listed in later Bulletins
Ref: TS 77-23 - 1948-1949 Body Lacquers
TS 78-4 - 1950-1954 Two-Tone Body Lacquers

WTN TECHNICAL SERVICE

______________________________

TS 77-22 - Front Seat Position, all 1948-1954 exc. Jet

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-22
File Under: BODY & FRAME

August 1977

ALL HUDSON OWNERS 1948-54 MODELS (Except Jet)
FRONT SEAT POSITION

      The front seat tracks used on all Hudson cars, 1948 thru 1954, except Jet, provide a fore-and-aft seat movement of 4 inches, obtained by raising tile lever on the left side and sliding the seat to the most comfortable position for the driver.

     In addition, further provision is made for changing the position of the seat itself on the tracks to accommodate persons of unusually tall. or short stature., This is done by simply removing the 4 screws holding the seat base to the tracks,, moving the seat backward or forward 1 inch and replacing the bolts through the extra set of holes in the seat base. Those two bolts securing the front seat adjusting handle must also be shifted in order that the adjusting control remains in the same relation to the track,

     The height and angularity of the front seat can also be changed to enhance driver comfort by raising the seat tracks at the front and/or rear, ends. This is accomplished by inserting front seat spacers, part #123405 and washers part #70746 singly or in combination on both sides between the bottom of the seat tracks and the floor panel until the most suitable position is found.

Yours very truly

A. E. Adams,
Technical Service Editor

______________________________

TS 77-23 - 480-490 Body Lacquers

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 77-23
File Under: BODY & FRAME

August 1977

All Hudson Owners - 1948-1949 Models
Body Lacquers Used On 480 and 490 Cars

Color option letter or number is stamped on right front door upper hinge and may be seen when door is open.

NAME	CODE	MODELS
Ebony Black Quartermaster Gray - Opal. Gallant Gray - Opal. Harness Tan - Opal. Banner Blue - Opal. Platinum - Opalescnet Savoy Green - Opal. Piedmont Green - Opal. Navahoe Bronze - Opal. Jockey Blue - Opal. Deep Maroon - Opal. Ruby Red - Opal. Queenstown Gray - Opal. Glowing Gray - Opal. Brigintine Blue - Opal. Jersey Blue - Opal. Holster Tan - Opal. Nomad Bronze - Opal. Pacmaker Green - Opal. Sierra Green - Opal. Hardwood Tan - Opal. Jet Blue - Opal. Brazilian Blue - Opal. Burgundy Maroon - Opal. Quebec Gray - Opal. Gull Gray - Opal. Radiant Red - Opal. Gray Gold - Opal. Brigade Blue - Opal. Roman Red - Bright Bright Red	K or 5 Q G H B CC S P N J M RR Q G B J H N 8 10 3 4 1 6 9 2 16 17 18 19 21	All All to 482-65778 All to 482-65778 All to 482-41102 All to 482-68732 All All All All to 482-1192 All to 482-68732 All All All from 482-65778 exc 65800-66458 incl. All from 482-65778 exc 65800-66458 incl. All from 482-68732 exc. 68900-69397 incl. All from 482-68732 exc. 68900-69397 incl. All from 482-41192 exc. 41401-41902 incl. All from 482-41192 exc. 41401-41902 incl. All All All All All All (Very limited usage) All All All All All All All

Duo-Tone Options
Piedmont Green Savoy Green	-upper -lower	Duo-Tone Sp - All
Banner Blue Jockey Blue	-upper -lower	Duo-Tone JB - All top 482-68732
Brigantine Blue Jersey Blue	-upper -lower	Duo-Tone JB - All after 482-68732 exc. 68900-69497 incl.
Gallant Gray Quartermaster Gray	-upper -lower	Duo-Tone QG - All to 482-65778
Glowing Gray Queenstown Gray	-upper -lower	Duo-Tone QG - All from 482-65778 exc. 65880-66458 incl.
Navahoe Bronze Harness Tan	-upper -lower	Duo-Tone HN - All to 482-41192
Nomad Bronze Bolster Tan	-upper -lower	Duo-Tone HN - all after 482-41192 exc. 41401-41902 incl.
Deep Maroon Ruby Red	-upper -lower	Duo-Tone RM - All
Burgundy Maroon Radiant Red	-upper -lower	Duo-Tone 15 - All
Pacemaker Green Sierra Green	-upper -lower	Duo Tone 14 - All
Gull Gray Quebec Gray	-upper -lower	Duo-Tone 13 - All
Radiant Red Roman Red	-upper -lower	Duo-Tone 20 - All
Radiant Red Bright Red	-upper -lower	Duo-Tone 22 - All
Bazilian Blue Jet Blue	-upper -lower	Duo-Tone 12 - All

One number is assigned to one color or Duo-Tone combination and will always identify that color or combination only.
Subsequent colors and combinations will receive new numbers as they are used. This will eliminate further need for supplying
serial numbers when colors change.

Yours Very Truly

A. E. Adams
Technical Service Editor

Reference:
Hudson Service Merchandiser, March 1950
Ref: TS 77-21 - 1950-1954 Body Lacquers
TS 78-4 - 1950-1954 Two-Tone Body Lacquers

______________________________

TS 78-1 - Check Perimiter Frame

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U. S.A.

TECHNICAL SERVICE BULLETIN

TS 78-1
File Under: Body and Frame

January 1978

ALL HUDSON OWNERS, 1948-54 MODELS
CHECK THE PERIMETER FRAME

   Before placing in service or restoring any car it should be placed on a lift and the frame carefully checked for accident or rust damage, The frame is perhaps the most critical part of the car, for like a building if the foundation is faulty the integrity of the whole structure is in doubt.

   On the Hudson "step-down" models of 1948-54, rust damage to the perimeter frame may be found when the car has been used for many years in humid areas and on winter roads where salt, was used. The perimeter frame covered externally on the sides by the rocker panels, is a steel box frame that extends from the cowl completely around the. body at a point just below the door sills. Welded to it are crossmembers floor pans, seat pans, etc., so that the frame and the body are welded into one unit, which Hudson called "Monobilt" construction. The body and frame reinforce one another. Convertible and Hollywood hard-top models have an additional box member welded inside the regular box frame side rails to compensate for the loss of strength provided by the sedan or club coupe body structure.

   If inspection shows rusted out areas caused by the build-up of silt on the inside of the box frame, and you are not familiar with welding, it is suggested that expert advice be obtained before proceeding. Usually rusted-out areas can be repaired provided   enough of the frame remains solid enough to weld. Remember the perimeter frame need not be as heavy as a frame on a "separate body frame" car because with Monobilt design the body reinforces the frame.

   The frame may be inspected further by removing the door sill scuff plates, and by removing the rocker panels, which are bolted on the 1948-53 models and the 1954 convertible. The 1953-54 Jet and the other 1954 models have welded-on rocker panels.

   The perimeter frame and cross-members should be periodically cleaned cut and rustproofed to prevent rust damage. The drain holes should he kept open.

Yours very truly,

A. E. Adams
Technical Service Editor

____________________________

TS 78-2 - Center Steering Pivot Pin Replacement

HUDSON MOTOR CAN COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 78-2
File Under: FRONT & REAR
SUSPENSION

January 1978

ALL HUDSON OWNERS, 1948-54 MODELS AXLES, STEERING GEAR
Center Steering Pivot Pin Replacement

The installation of the Center Steering Kit, Part Number F 306164, for all Hudson Cars-1948 to 1954, inclusive, seemingly has baffled some mechanics. Therefore we are presenting this information from the February, 1953 Hudson Service Merchandiser.

The pivot pin is a press fit in the center steering arm, secured by a No. 5 taper pin. The cross section of the center steering arm pivot pin and support bracket, illustrated below.

     When there is occasion for replacing center steering arm or pivot pin, disconnect tie rod ends, unbolt and remove center am pivot support bracket. Remove nut "H" shown in illustration and take out steering am and pivot assembly. Drive cut taper pin and press pivot pin out of steering am.

      The pivot pin is not drilled because it is much easier to drill it in position than to try to maintain the dimension, as shown in the illustration, and, at the some time, have the holes coincide.

     After pressing the new pivot pin in position in center steering am holding the dimension 2.055-2.053", as shown above, and with a good center punch mark pin for drill start through the large taper opening.

     Pivot pin is hardened over the bearing area only, and way be drilled quite easily-using a 1/4" inch drill, followed by reaming with a No. 5 taper reamer.

WTN TECHNICAL SERVICE

____________________________

TS 78-3 - 1948-1954 (exc. Jet) Valve Adjustment

HUDSON MOTOR CAR COMPANY

DETROIT, MICH., U.S.A.

CABLE ADDRESS

H U D S O N C A R

TECHNICAL SERVICE BULLETIN

TS-78-3

File Under; Service General

All Hudson Owners, 1948-1954 Six Cylinder (Exc. Jet)

Valve Adjustment

The following is a valve adjustment chart furnished by Jack Clifford for use on all "232", "262" and "308" six cylinder engines when setting valve lash with a cold engine. Jack says it is faster and more accurate than following the procedure outlined in TS 77-12, dtd May 1977.

Adjust valves in the "DOWN" position:

Valve No.

12

11

10

9

8

7

6

5

4

3

2

1

Type of Valve

Ex.

In.

Ex.

In.

Ex.

In.

Ex.

In.

Ex

Step 1

DN

UP

Step 2

UP

DN

Step 3

DN

UP

Step 4

UP

DN

Step 5

DN

UP

Step 6

UP

DN

When any two valves are up there will be two valves down, so by the time you rotate the engine one revolution you will have adjusted all the vavles exactly. REPEAT this procedure three times.

Cold Valve Lash Adjustment: Intake .012" Exhaust .019"

Yours very truly,

A. E. Adams

Technical Service Editor

_____________________________

TS 78-4 - 1950-1954 Exterior Body Colors

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 78-4
File Under: Body & FRAME

January 1978

ALL HUDSON OWNERS
Exterior Body Lacquers & Code – 1950-1953
(Two Color Combinations)

1950 Two Color Combinations
Code	Code
Legion Blue - upper 31 Lagoon Blue - lower Gray Mist - upper 32 TwiLight Gray - lower Peacock Green - upper 33 Oriental Green - lower Golden Gray - upper (Light) 34 Golden Gray - lower (Dark) Legion Blue - upper 39 Rivard Blue - lower Rivard Blue - upper 40 Legion Blue - lower	Twilight Gray - upper 41 Gray Mist - lower Oriental Green - upper 42 Peacock Green - lower Golden Gray - upper (Dark) 43 Golden Gray - lower (Light) Oriental Green - upper 56 Hawaii Green - lower Riviera Blue - upper 54 Bali Blue - lower Twilight Gray - upper 55 Field Gray - lower
1951 Two-Color Combinations
Pacific Blue - upper 67 Bali Blue - lower Northern Gray - upper 69 Newport Gray - lower Naples Green - upper 69 Jefferson Green - lower Pacific Blue - upper 73 French Gray - lower Northern Gray - upper 74 French Gray - lower Dark Maroon - upper 75 French Gray - lower Bali Blue - upper 78 French Gray - lower	Naples Green - upper 79 French Gray - lower Newport Gray - upper 80 French Gray - lower Toro Red - upper 81 French Gray - lower Burgundy Maroon - upper 84 French Gray - lower Jefferson Green - upper 86 Corinthian Cream - lower Admiral Blue - upper 38 Bali Blue - lower Admiral Blue - upper 89 French Gray - lower
1952 Two-Color Combinations
Boston Ivory - upper 100 Ebony Black - lower French Gray - upper 101 Broadway Blue - lower Boston Ivory - upper 102 Southern Blue - lower Boston Ivory - upper 133 Jefferson Green - lower Naples Green - upper 104 Jefferson Green - lower Boston Ivory - upper 105 Texas Tan - lower French Gray - upper 106 Toro Red - lower Ebony Black - upper 107 French- Gray - lower Toro Red - upper 108 French Gray - lower Southern Blue - upper 109 French Gray - lower Jefferson Green - upper 110 French Gray - lower Boston ivory - upper 111 Symphony Blue Green (Light) - lower	Symphony Blue Green (Light) - upper 112 Boston Ivory - lower Texas Tan - upper 113 Boston Ivory - lower Jefferson Green - upper 114 Boston Ivory - lower Gulf Green - upper 116 Naples Green - lower Gulf Green - upper 117 Jefferson Green - lower Naples Green - upper 118 Gulf Green - lower Jefferson Green - upper 119 Gulf Green - lower Ebony Black - upper 120 Boston Ivory - lower Ebony Black - upper 121 Symphony Blue Green (Light) - lower Broadway Blue - upper 122 Southern Blue - lower Symphony Blue Green (Light) - upper 124 Symphony Blue. Green (Dark) - lower Symphony Blue Green (Dark) - upper 125 Symphony Blue Green (Light) - lower
1953 Two - Color Combinations
Broadway Blue - upper 122 Southern Blue - lower Honey Cream - upper 139 Robins Egg Green - lower Toro Red - upper 139 Seal Gray - lower Honey Cream - upper 140 Texas Tan - lower Honey Cream - upper 141 Black - lower Honey Cream - upper 142 Southern Blue - lower Texas Tan - upper 143 Honey Cream - lower Robins Egg Green - upper 144 Blue Grass Green - lower Meadow Green - upper 145 Surf Green - lower Black - upper 147 Seal Gray - lower	Black - upper 148 Seal Gray - lower Honey Cream - upper 149 Broadway Blue - lower Honey Cream - upper 150 Meadow Green - lower Meadow Green - upper 151 Honey Cream - lower Black - upper 152 Robins Egg Green - lower Honey Cream - upper 153 Surf Green - lower Black - upper 154 Toro Red - lower Surf Green - upper 155 Meadow Green - lower Ebony Black - upper 156 Pearl Gray - lower Blue Grass Green - upper 157 Robins Egg Green - lower

Reference:
TS 77 - 23 - 1948 - 1949 Color Options
TS 77 - 21 - 1951 - 1954 Single Color Options

WTN TECHNICAL SERVICE

_____________________________________________

TS 78-6 - 1940-1942 Model Specifications

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U. S. A.

TECHNICAL SERVICE BULLETIN

TS 78-6
File Under: Service General

January 1978

All Hudson Owners, 1940-1941-1942 Models

MODEL	CYLS.	BORE x STROKE	WHEEL- BASE	START SERIAL NO.
1940 40T - Six-Traveler Series * 40P - Six DeLuxe * 40C - Six Business Car * 41 - Super Six 43 - Country Club Six 44 - Eight 45 - Eight DeLuxe 47 - Country Club Eight 48P - Big Boy 48P - Big Boy Business Cars	6 6 6 6 6 8 8 8 6 6	3 x 4-1/8" 3 x 4-1/8" 3 x 4-1/8" 3 x 5" 3 x 5" 3 x 4-1/2" 3 x 4-1/2" 3 x 4-1/2" 3 x 5" 3 x 5"	113" 113" 113" 118" 125" 118" 118" 125" 125" 125"	40-101 40-101 40-101 41-250 43-370 44-294 45-51752 47-167 48-16302 48-16302
1941 10T - Six-Traveler Series * 10P - Six DeLuxe * 10C - Six Business Cars * 11 - Super Six 12 - Commodore Six 14 - Commodore Eight 15 - Commodore Custom 8 Coupe 17 - Commodore Custom 8 Sedan 18P - Big Boy 18C - Big Boy Business Cars	6 6 6 6 6 8 8 8 6 6	3 x 4-1/8" 3 x 4-1/8" 3 x 4-1/8" 3 x 5" 3 x 5" 3 x 4-1/2" 3 x 4-1/2" 3 x 4-1/2" 3 x 5" 3 x 5"	116" 116" 116" 121" 121" 121" 121" 128" 128" 128"	10-101 10-101 10-101 11-201 12-202 14-203 15-5490 17-205 18-12548 18-12548
1942 20T - Six * 20P - Six DeLuxe * 20C - Six Business Cars * 21 - Super Six 22 - Commodore Six 24 - Commodore Eight 25 - Commodore Custom 8 Coupe 27 - Commodore Custom 8 Sedan 28C - Big Boy Business Cars	6 6 6 6 6 8 8 8 6	3 x 4-1/8" 3 x 4-1/8" 3 x 4-1/8" 3 x 5" 3 x 5" 3 x 4-1/2" 3 x 4-1/2" 3 x 4-1/2" 3 x 5"	116" 116" 116" 121" 121" 121" 121" 128" 128"	20-101 20-101 20-101 21-1324 22-1322 24-1318 25-5744 27-1319 28-101

* NOTE-The 3 x 4-1/8" engine is standard for models 40, 10, and 20.Starting with car No. 4052323, the 3 x 5 engine was optional equipment for model 40. The 3 x 5 engine is also optional for models 10 and 20. Models 10 and 20 cars equipped with the optional 3 x 5 engine are identified by the letter "L" stamped in lower left hand comer of car number plate.

The 3" x 5" engine may be identified by a 1/2" projection on right side of oil pan tray, 5-1/2" to the rear of oil suction pipe.
SPECIAL 1941 HUDSON SIX MODEL FOR CANADA my be identified by the absence of the letters - T, P, or C - on the car serial number plate. The principal points of difference are the use of the 3" x 5" engine as standard equipment, the use of friction type front door window wings and outside body mouldings.

PLATED BODY MOULDINGS FOR 1942 CARS, as well as trim mouldings and ornaments, were discontinued and superseded by painted or polished parts on care built after January 15, 1942, effective with car no. 37067.

BODY MODELS

CHASSIS MODELS

Two door Sedan
Four door Sedan 6 Passenger
Four door Sedan or 7 Passenger
Four door Sedan - 7 Passenger
Three passenger Coupe
Victoria Coupe
Club Coupe
Convertible Coupe
Convertible Sedan 4
Utility Coach
Utility Coupe
Carryall
Chassis with Cab
Cab Pickup
Panel Delivery
Station Wagon

40T,40P,41,44,10T,10P,11,12,14, 20T,20P,20C,21,22,
40T,40P,41,43,44,45,47,10T,10P,11,12,14,17,18P,20T,20P,21,22,24,27
40T,40P,41,43.44,45,47,10T,10P,11,12,14,17,20T,20P,21,22,24,27
43,47,48P,17,18P
40T,40P,41,44,10T,10P,11,12,14,15,20T,20P,21,22,24
40T,40P,41,44
10T,10P,11,12,14,15,20T,20P,21,22,24,25 40P,41,44
40P,41,44,
40P,41,44,10P,11,12,14,20T,20P,21,22,24
40C,10C,20T
40C,10C,20T
48P,18P
40C,48C, l0C, 18C,20C,28C
40C,48C,10C,18C,20C,28C
40C,48C
11,14,21

All-Purpose Delivery - 10C

CALENDAR YEAR SHIPMENTS FROM FACTORY:
   1940 - 86,965 cars - 1,035 commercial - 87,900 total
   1941 - 78,717 cars -    812 commercial - 79,529 total
   1942 -   5,396 cars -      67 commercial -   5,463 total

WTN TECHNCIAL SERVICE

_____________________________________________

TS 78-7 - 1942-1954 Speedometer Luberication

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 78-7
File Under: INSTRUMENT PANEL
& RADIO

January 1978

ALL HUDSON OWNERS, 1942-54 MODELS
Speedometer Lubrication

     Perhaps the most neglected point about the car from a standpoint of lubrication, is the speedometer. This may be accounted for by the fact that the point of applying lubricant cannot be easily seen and is not as accessible as most other points about the car.

    There is an oil hole and wick provided on the 1948-1954 models speedometer, just behind the head, for lubricating the pinion shaft to which the drive cable connects. This should be lubricated every 10,000 miles with a few drops of fine oil equivalent to a S.A.E. 10.

     The speedometer cable should be removed, cleaned free of all old grease and given a coating of light graphite grease. The cable may be checked for kinks or bends by laying out straight on a clean flat surface.

     It is not unusual that after a season or two of operation the speedometer registering pointer becomes unsteady or perhaps cable noise develops - both of which may be corrected by lubrication.

     The 1942-46 and 47 speedometers may be lubricated only after removal from the instrument board and taking out the oil hole plug.

Yours very truly,

A. E. Adams,
Technical Service Editor

Reference: Hudson Service Merchandiser. September 1950

____________________________________________

TS 78-8 - 1930 Hudson Trimming Specifications

HUDSON MOTOR CAR COMPANY
DETROIT, MICH., U. S. A.

TECHNICAL SERVICE BULLETIN

TS 78-8
File Under: Body & Frame
January 1978

All Hudson Owners:
1930 Hudson Trimming Specifications

The following trim specs for 1930 models may be of interest to all restorers of Hudson built cars from this year

1930 Hudson Models
	Color	Material	Manufacturer	Mfg.s Nr.
Hudson Coach (119") Headlining Side Walls, Door Panels, Backs of Front Seats Seat Cushions & Backs Carpet Windlace Curtains	Gray Wood Wood Gray Beige Gray	Napped Cloth Velour Velour . . . . . . . . . . . Imit. Leather . . . . . . . . . . .	Carolina Cotton & Woolen Mills E. F. Timme & Sons Collins & Aikman C. H. Masland & Sons . . . . . . . . . . . Adams & Westlake Co.	1235HOO 1250 2733 V76C . . . . . . Rex. No. 3
Hudson Coupe - 2 & 4 Pass. (119") Headlining Side Walls, Door Panels, Front Seat Cushion & Back Rumble Seat Cushions & Backs Carpet Windlace Curtains	Gray Brown Brown Gray Gray Gray	Cloth Mohair & Wool Leather D. B. #2 . . . . . . . . . . . Worsted . . . . . . . . . . .	Carolina Cotton & Woolen Mills L. C. Chase & Co. American Oak Leather Co. W. J. Sloane Vogt Fast Needle Weave Excell Curtain Company	1235 6102 29 HP4151 . . . . . . X2658B1
Hudson Phaeton (119") Seats & Backs Side Walls, Door Panels, etc Carpet	2-Tone Gray Gray Gray	Leather D. B. #1 Imit. Leather . . . . . . . . . . .	Eagle Ottawa Co. . . . . . . . . . . . . . . . C. H. Masland & Sons	S50771 . . . . . . . . B76C
Hudson Roadster (119") Seat Cushions & Backs Side Walls, etc. Carpet, Rumble Seat	Gray & Black Gray & Black Gray	Leather D. B. 1 Imit. Leather . . . . . . . . . . .	Cleaveland Tanning Co. . . . . . . . . . . . . . . . C. H. Masland & Sons	1801-92 . . . . . . . . V760
Hudson Standard Sedan (119") Headlining Side Walls, Door Panels, Seat Cushion & Backs of Front Seat Carpet Windlace Curtains	Tan Tan Gray Tan . . . . . .	Napped Cloth Mohair "A" . . . . . . . . . . . Rayon Adams & West lake	Amoskeag Mfg. Co. Colins & Aikman W. & J. Sloane Bridgeport Coach Lace Co. Rex No. 3	2508 534 V76C 5-581RA . . . . . . . .
Hudson Sun Sedan (119") Seat Cushions & Backs, Side Walls, etc Carpet Windlace	Brown & Stripe Gray Brown	Bedford Cord . . . . . . . . . . . Imit. Leather	Rockanum Mills C. H. Masland & Sons . . . . . . . . . . . . . . .	6006.5 V76C . . . . . . .
Hudson Brougham (126") Headlining Upper Side Walls, Lower Side Walls, Seat Cushions, Backs etc. Carpet Windlace Curtains	Gray Gray Gray Gray Beige Gray	Napped Cloth Plain Broadcloth Cloth . . . . . . . . Imit. Leather . . . . . . . . .	Amoskeag Mfg. Co. Wm. Wiese & Co. Wm. Wiese & Co. W. & J. Sloane . . . . . . . . . . . . . . . Adams & Westlake	. . . . . . . 3797 3796 V76C . . . . . . . Rex No. 3
Hudson Phaeton - 7-Pass. (126") Seas& Backs, All Side Walls, Door Panels Carpet	2-Tone Gray 2-Tone Gray Gray	Leather Imit. Leather . . . . . . . . .	D. B. Eagle Ottawa Co. . . . . . . . . . . . . . . . C. H. Masland & Sons	3-50771 . . . . . . . V76C
Hudson Sedan - 7-Pass. (126") Car. No. 46702 to 47129 Headlining Side Walls, Door Panels, Backs of Front Seats Seat Cushions & Backs Carpet Windlace Curtains	Fawn Fawn Fawn Fawn Fawn Fawn	Napped Cloth Broadcloth Broadcloth Wool . . . . . . . . . . . . . . . . . .	Amoskeag Mfg. Co. Wm. Wiese Co. Wm. Wiese Co. Bigelowe-Hartford Vogt Adams-Westlake	2424 3371 3370 223-4 3034 . . . . . . .
Hudson Sedan - 7-Pass. (126") Car. No. 47129 up Headlining Side Walls, Door Panels, Backs of Front Seats, Seat Cushions & Backs Carpet Windlace Curtains	Gray Gray Gray Gray Gray	Napped Cloth Broadcloth Wool Rayon . . . . . . . . .	Amoskeag Mfg. Co. Gleside Woolen Mills W. & I. Sloane Superior Felt Products Adams & Westlake	2589 101 M1040C 10140 Rex No. 3
Hudson Touring Sedan (126") Headlining Side Walls, Backs. Side Walls, Door Panels, Etc. Carpet Windlace Curtains	Gray Gray Gray Gray Gray	Napped Cloth Mohair "A" . . . . . . . . . Rayon . . . . . . . . .	Amoskeag Mfg. Co. Collins & Aikman W. & J. Sloane Bridgeport Coach Lace Co. Adams & Westlake	2515 533 V78C 283VVRA Rex No. 3

Reference: Hudson Reference Sheet No. 42, March, 1930
NOTE: See TS 77-13 for 1930 Essex Trimming Specifications.

_____________________________________________

TS 78-9 - 1946-1947 Model Information

HUDSON MOTOR CAN COMPANY
DETROIT, MICH., U. S.A.

TECHNICAL SERVICE BULLETIN

TS 78-9
File Under: Service General

January 1978

ALL HUDSON OWNERS 1946-1947 MODELS

1946-1947 Model Information

Model No.	MODEL NAME	Wheel- base	No. of Cyls.	Bore & Stroke	Starting Car No.	Corresponding 1942 Model
51 171 52 172 53 173 54 174 58 178	Super 6 " " Commodore 6 " " Super 8 " " Commodore 8 " " Business Cars " "	121" 121" 121" 121" 121" 121" 121" 121" 128" 128"	6 6 6 6 8 8 8 8 6 6	3" x 5" 3" x 5" 3" x 5" 3" x 5" 3" x 4½" 3" x 4½" 3" x 4½" 3" x 4½" 3" x 5" 3" x 5"	31-101 171-101 32-101 172-101 33-16269 173-101 34-16285 174-101 38-215 178-101	21 22 24 25 28
CAR NUMBERING SYSTEM FOR 1946 Hudson cars: The first two figures of the car number denote the chassis model, according to the following plan: 31 - denotes Model 51 33 - denotes Model 53 38 - denotes Model 58 32 - denotes Model 52 34 - denotes Model 54
CAR NUMBERS OF THE 1947 Models use the first three figures to denote tile chassis model instead of the first two as on previous models. The. remaining figures in the car number comprise the actual serial number of the car, and these figures run in a single series, regardless of model. The car number is stamped on a metal plate located on the rear of the right front body pillar, and may be seen by opening the right front door. The engine number, which is the same as the car number, is stamped on the top of the cylinder block, right side, between numbers one and two exhaust ports.
CHASSIS MODELS
BODY MODELS				CHASSIS MODELS
Two door Brougham Four door Sedan Three Passenger Coupe Club Coupe Convertible Brougham Chassis with Cab Cab Pickup			51-171 51-52-53-54-171-172-173-174 51-171 51-52-53-54-171-172-173-174 51-54-171-174 58-178 58-178

CALENDAR YEAR SHIPMENTS FROM FACTORY
1946 - 90,766 cars 3,104 commercial 93,870 Total
1947 - 100,393 cars 2,917 commercial 103,310 Total

WTN Technical Service

____________________________________________

TS 78-10 - Headlight Mounting Ring & Housing Interchange

HUDSON MOTOR CAN COMPANY
DETROIT, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 78-10
File Under: ELECTRICAL

January 1978

ALL HUDSON OWNERS 1940-54 MODELS
Headlight Mounting Ring & Housing Interchangeability

Headlamp Housing Assembly, #220703, as shown in Figure #1, may be used as a replacement Housing for all Models from 1940 through 1954.

When used as a replacement on models prior to 1948, Clips "B" in illustration Figure #1, are used to engage the retaining springs of Mounting Ring #141855, Figure #3, used on all Models 1940 through 1947.

Mounting Ring, #220704, Figure #2 is used on all Models from 1950 through 1954 and uses a single retaining spring, retained by Clip "A" in the Headlamp Housing Figure #1.

Mounting Ring, #220704, may also be used as a replacement for #141855 on earlier Models, by the addition of a Retaining Spring, #141857, the springs then being relocated the same as shown in Figure #3, as provided for on the new Mounting Ring.

Yours very truly,

A. E. Adams
Technical Service Editor

Reference: Hudson Service Merchandiser
January 1951
____________________________________________

TS 78-14 - 1948-1954 Model Information

HUDSON MOTOR CAR COMPANY
DETROIT 14, MI., U. S. A.

TECHNICAL SERVICE BULLETIN

TS 78-14
File Under: Service General

March 1978

All Hudson Owners - 1948-1954 Models
1948-1954 Model Information

Model Name	Model	Starting Car No.	Wheel- Base	Engine CID	Body Types
1948 - 480 Series Super Six Commodore Six Super Eight Commodore Eight	481 482 483 484	481-101 482-101 483-101 484-101	124 124 124 124	262 262 254 254	4Sd, 2Sd, BsCp, C1Cp, CvBro 4Sd, C1Cp, CvBro 4Sd,, C1Cp 4Sd, C1Cp, CvBro
1949 - 490 Series Super Six Commodore Six Super Eight Commodore Eight	491 492 493 494	491-101 492-101 493-101 494-101	124 124 124 124	262 262 254 254	4Sd, 2Sd, BsCp, ClCp, CvBro 4Sd, C1Cp, CvBro 4Sd, 2Sd, C1Cp 4Sd, C1Cp, CvBro
1950 - 500 Series Pacemaker Pacemaker Deluxe Super Six Commodore Six Super Eight Commodore Eight	500 50A 501 502 503 504	500-101 50A-101 501-101 502-101 503-101 504-101	119 119 124 124 124 124	232 232 262 262 254 254	4Sd, 2Sd, BsCp, C1Cp, CvBro 4Sd, 2Sd, C1Cp, CvBro 4Sd, 2Sd, C1Cp, CvBro 4Sd, CLCp, CvBro 4Sd, C1Cp, 2Sd 4Sd, C1Cp, CvBro
1951 - "A" Series Pacemaker Custom Super Six Custom Commodore Six Custom Hornet Commodore Eight Custom	4A 5A 6A 7A 8A	4A-101 5A-101 6A-101 7A-101 8A-101	119 124 124 124 124	232 262 262 308 254	4Sd, 2Sd, BsCp, C1Cp, CvBro 4Sd, 2Sd, C1Cp, CvBro, Hlywd 4Sd, C1Cp, CvBro, Hlywd 4Sd, C1Cp, CvBro, Hlywd 4Sd, C1Cp, CvBro, Hlywd
1952 - "B" Series Pacemaker Wasp Commodore Six Hornet Commodore Eight	4B 5B 6B 7B 8B	4B-101 5B-101 6B-101 7B-101 8B-101	119 119 124 124 124	232 262 262 308 254	4Sd, 2Sd, BsCp, C1Cp 4Sd, 2Sd, C1Cp, CvBro, Hlywd 4Sd, C1Cp, CvBro, Hlywd 4Sd, C1Cp, CvBro, Hlywd 4Sd, C1Cp, CvBro, Hlywd
1953 - "C" Series Jet Super Jet Wasp Super Wasp Hornet	1C 2C 4C 5C 7C	203865 203543 202928 202919 212917	105 105 119 119 124	202 202 232 262 308	4Sd 4Sd, 2Sd 4Sd, 2Sd, C1Cp 4Sd, 2Sd, CICp, CvBro, Hlywd 4Sd, C1Cp, CvBro, Hlywd
1954 - "D" Series Jet Jet Family Sedan Super Jet Jet Liner Wasp Super Wasp Hornet Special Hornet	1D 1D 2D 3D 4D 5D 6D 7D	1269062 1296953 2269060 3269070 4269069 5269075 6295720 7269066	105 105 105 105 119 119 125 125	202 202 202 202 232 262 308 308	4Sd, 2Sd 2Sd 4Sd, 2Sd 4Sd, 2Sd 4Sd, 2Sd,, CICp 4Sd, 2Sd,, C1Cp, CvBr, Hlywd 4Sd, 2Sd, C1Cp 4Sd, C1Cp, CvBro, Hlywd
NOTE: 119" wb was actually 119-7/8"; 124" wb was actually 123-7/8"

ENGINE CHART

Cu. In. Displ.	No. of Cyl.	Bore x Stroke	Standard as shown above Optional as shown below
202 232 262 308 254	6 6 6 6 8	3" x 4-3/4" 3-9/16" x 3-7/8" 3-9/16" x 4-3/8" 3-13/16" x 4-1/2" 3" x 4-1/2"	Optional in 4A, 4B, 4C, 4D
Iron cylinder head was standard on all models except 7A, 7B, 7C, 6D and 7D which used aluminum heads as standard. However, due to material shortages some 7A, 7B and 7C engines with a higher compression iron cylinder head.

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TS 78-15 - 1939 Model Information

HUDSON MOTOR CAR COMPANY
DETROIT 14, MICH., U. S. A.

TECHNICAL SERVICE BULLETIN

TS 78-15
File Under: SERVICE GENERAL

March 1978

ALL HUDSON OWNERS - 1939 MODELS
1939 MODEL INFORMATION

Model No.	Model Name	No. Cyls.	Bore x Stroke	Wheel- base	Starting Car No.
90 90 92 93 95 97 98	Hudson 112 Passenger Series Hudson 112 Business Series Hudson Six Series Hudson Country Club Six Hudson Country Club Eight Hudson Custom Country Club Eight Hudson Business Cars - Big Boy	6 6 6 6 8 8 6	3" x 4-1/8" 3" x 4-1/8" 3" x 5" 3" x 5" 3" x 4-1/2" 3" x 4-1/2" 3" x 4-1/8"	112" 112" 118" 122" 122" 122" 119"	90-101 90-101 92-101 93-101 95-101 97-101 98-101

CAR NUMBERING SYSTEM

In the car numbering system used in 1939 Hudson production, the first two figures of the car number denote the model, The succeeding figures comprise the actual serial number, and these figures run in a single series, regardless of model.

The car number is located on the rear of the right front hinge pillar.

Engines in 1939 production bear the same numbers as the serial number of the cars in which they are placed. This number is located on the top of cylinder block, right side, between number one and number two exhaust ports.

BODY MODELS

Brougham
Sedan
3-Passenger Coupe
Victoria Coupe
Convertible Coupe
Convertible Brougham
Utility Coach
Utility Coupe
Cab and Chassis
Cab Pickup
Panel Delivery
Station Wagon

CHASSIS MODELS

90, 92, 93, 95
90, 92, 93, 95, 97, 98
90, 92, 93, 95
90, 92, 93, 95
90, 92, 93, 95
90, 92, 93, 95
90
90
90, 98
90, 98

90, 98

90

CALENDAR YEAR SHIPMENTS FROM FACTORY

1939 - 81,521 cars 640 Commercial 82,161 Total

WTN TECHNICAL SERVICE
____________________________________________

TS 78-17 - 1938 Model Information

HUDSON MOTOR CAR COMPANY
DETROIT 14, MICH., U. S. A.

TECHNICAL SERVICE BULLETIN

   TS 78-17
   File Under: SERVICE GENERAL

   May 1978

ALL HUDSON OWNERS, 1938 MODELS
1938 MODEL INFORMATION

Model No.	Model Name	No. Cyls.	Bore & Stroke	Wheel- Base	Starting Car No.
80 81 82 83 84 85 87 88 89	Terraplane Commercial Terraplane Deluxe Terraplane Super Hudson Custom 6 Hudson Deluxe 8 Hudson Custom 8 Hudson Country Club 8 Hudson “112” Terraplane Commercial	6 6 6 6 8 8 8 6 6	3 x 5 3 x 5 3 x 5 3 x 5 3 x 4½ 3 x 4½ 3 x 4½ 3 x 4-1/8 3 x 5	21.6 21.6 21.6 21.6 28.8 28.8 28.8 18.6 21.6	80-101 81-101 82-101 83-101 84-101 85-101 87-101 89-101 88-101

CAR NUMBERING SYSTEM:

    In the car numbering system used in 1938 Hudson production, the first figure of the car number denotes the year, the sec-
ond number denotes the model. The remaining number comprises the actual serial number. These numbers run in sequence
regardless of model.
    Commencing with the following, serial and engine numbers were identical:

        Models 80, 81, 82, 83, 88 - 11630, except 12000 to 12319
        Models 84, 85, 87             - 11426
        Model 89                           - 28566

BODY MODELS (Passenger Cars)	CHASSIS MODELS	BODY MODELS (Commercial Cars)	CHASSIS MODELS
3-Pass. Coupe 6-Pass. Brougham 3-Pass. Victoria Coupe 4-Pass. Victoria Coupe 6-Pass. Touring Brougham 6-Pass. Sedan 6-Pass. Touring Sedan 3-Pass. Convertible Coupe 5-Pass. Convertible Coupe 6-Pass. Convertible Brougham	81,82, 83, 84, 85, 89 81,82, 83, 84, 85, 89 81,82, 83, 84, 85, 89 81,82, 83, 84, 85, 89 81,82, 83, 84, 85, 89 81,82, 83, 84, 85, 87, 89 81,82, 83, 84, 85, 87, 89 83. 84, 89 81, 82 81, 82, 83, 84, 89	Cab Pickup 5-Pass. Station Wagon Utility Coach Utility Coupe Utility Touring Coupe Utility Touring Coach 7-Pass. Taxi Sedan Cab & Chassis 6-Pass. Sedan	80, 88 80 89 80 89 80, 89 88 88 88

CALENDAR YEAR SHIPMENTS FROM FACTORY:
Passenger Cars (Hudson) - 43,682; Passenger Cars (Terraplane) - 6,588; Commercial Cars - 808

WTN TECHNICAL SERVICE

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TS 78-21 - 1948-1954 Engine Information (exc. "202")

HUDSON MOTOR CAR COMPANY
DETROIT 14, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 78-21
File Under: ENGINE

ALL HUDSON OWNERS, 1948-56, SIX CYL (EX. "202")

ENGINE INFORMATION, SIX CYLINDER, 1948-56 (EXCEPT "202")

All 1948-56 Hudson six cylinder engines, except the "202" engine, are basically the same except as noted below. In addition to the information on this page, this bulletin contains illustrations showing all the parts of the engine and identifies each part to facilitate the ordering of parts.

Cu. In. Disp.	Bore x Stroke	Used in Chassis Models
308 262 232	3-13/16" x 4-1/2" 3-9/16" x 4-3/8" 3-9/16" x 3-7/8"	7A, 7B, 7C, 6D, 7D, 35560, 35660 481, 482, 491, 492, 501, 502, 5A, 6A, 5B, 6B, 5C, 5D. (Optional 4A, 4B, 4C, 4D.) 500, 50A, 4B, 4C, 4D.

THE CYLINDER WATER JACKETS were modified, beginning with the first production of the 1951 Models ("A" Series), to make for a more uniform distribution of water on both sides of cylinder bores. This affected a change in the position of the water passageways between the cylinder head and the block. In addition, the block was increased in width. Therefore, the 1948-50 Cylinder heads and gaskets are not interchangeable with the 1951-56 models.

THE STEEL TYPE OIL PUMP GEAR was replaced with an aluminum bronze gear during 1950 production, so that any wear would be transferred from the camshaft to the more easily replaced oil pump gear. This aluminum bronze gear was used through 1956. The condition of this gear should be checked if mileage is unknown or if it has been used over 40,000 miles. The amount of wear will vary considerably, depending upon driving conditions.

THE TIMING CHAIN should be checked after 40,000 miles, or possibly be replaced every 40,000 miles if top performance is desired, according to reports from the, field. Timing chain cover assembly 301342, having chain shoe welded to it was used in "D" series to serial numbers 4D-4286275, 5D-5285985, 7D-7285812. In subsequent serial numbers cover 300188 is used with 310880 Snubber & Oil Trough Assembly bolted to front of cylinder block. 300188, 310880 may be used for service by removing plug bolt in cylinder block and attaching snubber assembly in same.

HYDRAULIC VALVE LIFTERS were used only in 1956 (Model 35660).

WTN TECHNICAL SERVICE
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Page 2 of 5

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ENGINE - UPPER SECTION

H2-1      Cylinder and piston assembly
H2-15    Pipe - water distribution
H13-1    Cylinder head
H3-5      Gasket - cylinder head
H3-10    Cap screw - cylinder head
H3-11    P/Washer - Cylinder head cap screw
H3-14    Water outlet - cylinder head
H3-16    Gasket - cylinder head water outlet
H3-17    Bolt - water outlet front
H3-18   L/Washer - water outlet bolt
H3-20   Thermostat
H3-30   Spark plug
H4-1     Exhaust - Manifold assembly
H4-10   Damper - exhaust
H4-23   Stud - intake to exhaust
H4-24   Stud - exhaust manifold
H4-26   Nut - exhaust manifold
H4-27   P/Washer - exhaust manifold
H4-35   Elbow - exhaust manifold
H4-36   Gasket - elbow to manifold
H4-37   Nut - exhaust manifold
H5-1    Intake manifold
H5-15   Clamp - manifold
H5-32   Nut
H5-34   Plain washer
H5-35   Gasket
H11-35 Cover - valve chamber
H11-40 Screw - valve cover
H11-45 Breather tube
H11-49 Gasket - breather tube
H11-53 Screw- breather tube
H13-1   Oil pump assembly
H13-2   Gasket - oil pump
H13-5   Cap screw - oil pump
H14-1   Water pump
H 14-2 Bolt - pump to cylinder
H 14-3 Bolt - pump to cylinder
H14-13 Gasket - pump to cylinder
H14-26 Pulley - water pump
H14-30 Fan belt
H14-31 Fan blade
H14-32 Cap screw
H 14-33 Lock washer
NI-1      Carburetor assembly
NI-4      Gasket - carburetor
N1-6   Deflector - heat
N1-9   Nut - carburetor
N1-14 Tube and cover assembly
N4-1    Fuel pump
N4-8    Sleeve - pump to cylinder
N4-9    Bolt - pump to cylinder
N4-18 Spacer - fuel pump

ENGINE - LOWER SECTION
H6-1    Crankshaft
H6-2    Bolt - flywheel
H6-3    Bushing - mainshaft pilot
H6-4    Retainer
H6-11 Screw - main bearing cap
H6-13 Lock plate - main bearing cap
H6-19 Dowel - main bearing cap
H8-6    Bearing - connecting rod
H9-1    Piston
H9-2    Pin - piston Ring
H9-3    Piston pin
H9-4    Lock - piston

ENGINE - LOWER SECTION (Cont')
H9-7    Ring - piston upper
H9-1    Ring - piston upper - oil
H9-14 Ring - piston lower - oil
H10-3 Vibration dampener
H10-4   Hub
H 10-5 Facing - front
H 10-6 Plate - cover
H10-7   Bolt - cover
HI0-10 Spacer
H10-1 Key
H12-1   Pan assembly
H12-2   Flange - suction pipe
H12-6 Plug - oil drain
H12-7   Pipe - oil suction
H12-12 Screen - oil pan
H12-13 Gasket - oil pan
H 12-17 Seal - oil pan
H12-25 Bolt - oil pan
H12-28 Lock washer - oil pan boll
H15-2   Sprocket - crankshaft
H15-6   Key - sprocket
H15-8   Timing chain
H6-23   No. 1 bearing - crankshaft
H6-24   No. 2 bearing - crankshaft
H6-25   No. 3 bearing - crankshaft
H6.26   No. 4 bearing - crankshaft
H6-40   Seal - rear main bearing
H6-80   Flywheel
H6-81   Starter gear - flywheel
H6-82   Plug - flywheel drain
H6-83   Gasket - drain plug
H8-1     Connecting rod
H8-2     Bolt - connecting rod
H8-3     Nut - connecting rod bolt
H8-4     Companion nut
H8-5     Bushing - piston pin

ENGINE CAMSHAFT AND VALVES
H7-1    Camshaft
H7-7    No. 1 bearing - camshaft
H7-8    No. 2 bearing - camshaft
H7-9    No. 3 bearing - camshaft
H7-1    No. 4 bearing - camshaft
H7-21 Thrust plate - camshaft
H7-22 Bolt - thrust plate
H7-23 Lock
H11-1 Valve - inlet
H11-3 Valve - exhaust
H11-6 Guide - inlet
H11-8 Guide - exhaust
H11-11 Spring - valve
H11-13 Seat - valve spring
H11-15 Retainer - valve seat
H11-18 Tappet
H11-20 Adjusting screw
H15-1   Sprocket - camshaft
H15-5   Bolt - sprocket
H15-9   Trough - oil
H15-10 Bolt
H15-11 Cover - timing chain
H15-12 Shoe - timing cover
H15-13 Rivet - cover
H15-14 Bumper - timing chain
H15-18 Oil seal - timing cover
H15-19 Gasket - timing cover
H 15-21 Bolt - timing cover
H15-23 Lock washer

____________________________________________

____________________________________________

TS 78-22 - Install Hot Water Heaer in Essex with Thermosyphon Cooling

HUDSON MOTOR CAR COMPANY
DETROIT 14, MICH., U.S.A.

TECHNICAL SERVICE BULLETIN

TS 78-22
File Under: ENGINE COOLING
& WEATHER CONTROL

ALL ESSEX OWNERS, MODELS WITH THERMOSYPHON COOLING

INSTALLATION OF HOT WATER HEATER

   Reports from the field indicate that many owners of Essex and other cars using thermosyphon cooling systems are unaware of how to install a hot water heater in these models. D. C. Daugherty has supplied the following instructions for such an installation.

     1. If the hot water heater you wish to install is an early model, probably has an air release valve in the top. Remove this valve, leaving the valve body in the tank.

     2. Epoxy cement a piece of loose-fitting copper tubing in the valve body opening. Since there is no strain at this point, the use of epoxy cement is recommended.
         If heater has no air outlet, drill hole in top or tank and epoxy tubing in place.

     3. Drill a hole in the extreme top of the radiator tank the size or the copper tubing. Put a 90 deg. angle in this tube then epoxy cement to tank opening.

     4. Install heater as high as being careful not to interfere with wiring etc.

     5. Install a piece of plastic or wiper tubing from the top of the radiator tank to the top of the heater as illustrated below.

    6. Hose clamps, as illustrated were furnished with universal type hot water heaters made for cars not equipped for heaters. These clamps simplify the installation.

If they are not available, drill water manifolds and braze a short piece of pipe into the hole.

7. Be certain to install the heater hose from the top engine water connection to the top heater water connection and from the bottom engine water connection to the bottom heater water connection.

8. Hook up heater fan switch. Adjust shutters on front of neater to obtain desired temperature.

WTN Technical Service

____________________________________________

TS 78-23 - 1937 Hudson & Terraplane Model Information

HUDSON MOTOR CAR COMPANY
DETROIT 14, MICH., U. S. A.

TECHNICAL SERVICE BULLETIN

   TS 78-23
   File Under: SERVICE GENERAL

    November 1978

ALL HUDSON OWNERS, 1937 MODELS
1937 MODEL INFORMATION

Model No.	Model Name	No. Cyls.	Bore & Stroke	Wheel- Base	Starting Car No.
70 71 72 73 74 75 76 77 78	Terraplane Commercial Terraplane Deluxe Terraplane Super Hudson Custom 6 Hudson Deluxe 8 Hudson Custom 8 Deluxe 8 Custom 8 Terraplane Commercial	6 6 6 6 8 8 8 8 6	3 x 5 3 x 5 3 x 5 3 x 5 3 x 4½ 3 x 4½ 3 x 4½ 3 x 4½ 3 x 5	21.6 21.6 21.6 21.6 28.8 28.8 28.8 28.8 21.6	70-101 71-101 72-101 73-101 74-101 75-101 76-101 77-101 78-101

CAR NUMBERING SYSTEM:

In the car numbering system used in 1937 Hudson production, the first figure of the car number denotes the year, the sec-
ond number denotes the model. The remaining number comprises the actual serial number. These numbers run in sequence
regardless of model.

BODY MODELS (Passenger Cars)	CHASSIS MODELS	BODY MODELS (Commercial Cars)	CHASSIS MODELS
2-Pass. Business coupe 3-Pass. Coupe 5-Pass. Brougham 3-Pass. Victoria Coupe 5-Pass. Touring Brougham 5-Pass. Sedan 5-Pass. Touring Sedan 3-Pass. Convertible Coupe 4-Pass. Convertible Coupe 4-Pass. Convertible Brougham	71, 72, 73 71, 72, 73, 74,75 71, 72, 73, 74,75 71, 72, 73, 74,75 71, 72, 73, 74,75, 76, 77 71, 72 71, 72, 73, 74,75, 76, 77 71, 72 73, 74, 75 73, 74, 75	3/4 Ton Chassis 3/4 Ton Chassis w/cab 3/4 Ton Pickup 1/2 Ton Utility Coupe 1/2 Ton Utility Coupe Pickup 3/4 Ton Panel Delivery 5-Pass. Station Wagon	70, 78 70, 78 70., 78 70 70 78 70

CALENDAR YEAR SHIPMENTS FROM FACTORY:
Passenger Cars (Hudson) - 19,848; Passenger Cars (Terraplane) - 83,436; Commercial Cars - 8,058

WTN TECHNICAL SERVICE

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TS 78-24 - Rear Axle ID and Usage - 1948-1954

HUDSON MOTOR CAR COMPANY
DETROIT, 14, MICH., U. S. A.

TECHNICAL SERVICE BULLETIN

TS 78-24

File Under: FRONT & REAR SUSPENSION
AXLES, STEERNG GEAR

ALI. HUDSON OWNERS, 1948-54 MODELS

REAR AXLE IDENTIFICATION AND USAGE, 1948-1954

Two types of rear axles were used in Hudson cars during 1918-1954, The first type axle was used in 1940-1952 and is denoted in this Bulletin by "H". It is identified by a housing with a welded cover. The second type was used in 1952-1954 and is denoted in this Bulletin by "F". It is identified by a housing with a bolted cover. The first car manufactured with the "F" axle was 7B-159456.

To identify the ratio of the "H" type rear axle a number is stariped on the flange of the differentia] carrier where it is bolted tc the housing. Fcr the "P" type rear axle an identifying number is stamped on a tag which is attached to the axle by one of the cover bolts.

STANDARD USAGE RATIOS:

Year Used	Type	Ratio	Identification
1948-1952 1948-1952 1950 1951-1952 1952-1954 (exc. Jet) 1952-1954 (exc. Jet) 1952-1954 (exc. Jet) 1953-1954 Jet 1953-1954 Jet 1953-1954 Jet 1953-1954 Jet	“H” “H” “H” “H” “P” “P” “P” “P” “P” “P” “P”	4.10-1 4.55-1 3.82-1 3.58-1 4.09-1 4.55-1 3.07-1 4.10-1 4.27-1 3.54-1 3.31-1	1-10 5-9 9-11 7-12 45/11 50/11 43/14 41/10 47/11 46/13 43/13

SEVERE USAGE RATOS:

For All 1952-1954 Except Jet Models	For All Jet Models
3.07-1 3.31-1 3.92-1 4.27-1 4.55-1 3.53-1 4.09-1	4.89-1 4.27-1 4.09-1 3.92-1 3.54-1 3.31-1

____________________________________________
Page 2 - TS 78-24

1. Drive shaft nut
2. Drive shaft nut washer
3. Drive shaft key
4. Adjusting cap bolt nut
5. Adjusting cap bolt nut lockwashers
6. Brake backing plate
7. Adjusting cap bolt
8. Wheel bearing cup
9. Wheel bearing cone
10. Axle housing
11. Spring mounting pad
12. Differential carrier gasket
13. Differential carrier to housing bolt lock washer
14. Differential carrier to housing bolt nut
15. Differential carrier to housing bolt

16. Differential carrier to cap assembly
17. Differential case left half
18. Drive pinion
19. Rear pinion bearing cup
20. Pinion bearing spacer
21. Front pinion bearing cup
22. Pinion oil seal
23. Rear axle companion flange
24. Rear axle companion flange nut
25. Rear axle companion flange washer
26. Drive pinion oil washer
27. Front pinion bearing cone
28. Rear pinion bearing cone
29. Rear pinion bearing shim
30. Differential pinion shaft locating screw

____________________________________________

Page 3 - TS 78-24

"H" TYPE REAR AXLE

FIGURE 2

31. Differential pinion assembly
32. Differential pinion bushing
33. Differential bearing cup
34. Differential bearing cone
35. Drive shaft thrust spacer
36. Drive shaft nut cotter
37. Wheel bearing adjusting cap
38. Wheel bearing adjusting cap oil seal
39. Wheel bearing adjusting cap shims
40. Wheel bearing grease hole plug
41. Drive shaft oil seal assembly
42. Drive, shaft
43. Rear axle housing stabilizer bracket cotter
44. Rear axle housing vent assembly
45. Differential pinion thrust washer
46. Drive shaft thrust button

47. Differential gear
48. Differential gear thrust washer
49. Drive gear bolt
50. Drive gear bolt lockwasher
51. Drive gear
52, Differential pinion shaft
53. Differential care screw lockwasher
54. Differential case screw
55. Differential case right half
56. Housing cover
57. Housing cover drain plug
58. Differential bearing adjusting cap
59. Differential bearing adjusting nut lock
60. Differential bearing adjusting nut lock
61. Differential bearing adjusting nut

62. Differential bearing adjusting cap screw

____________________________________________

Page 4 - TS 78-24

"P" TYPE REAR AXLE

____________________________________________

Page 5 - TS 78-24

LEGEND

1. Axle Shaft Nut
2. Axle Shaft Washer
3. Axle Shaft Key
4. Wheel Bearing Adjusting Cap Oil Seal
5. Wheel Bearing Oil Seal Cap
6. Wheel Bearing Adjusting Shims
7. Wheel Bearing Cup
8. Wheel Bearing Cone
9. Wheel Bearing Inner Oil Seal
10. Axle Shaft
11. Carrier and Tube Assembly
12. Companion Flange
13. Drive Pinion Washer
14. Drive Pinion Nut
15. Drive Pinion Dirt Shield
16. Drive Pinion Oil Seal
17. Drive Pinion Oil Seal Gasket
18. Drive Pinion Felt Wick
19. Drive Pinion Oil Slinger
20. Drive Pinion Front Bearing Cup
21. Drive Pinion Front Bearing Cone
22. Drive Pinion Front Bearing Shims
23. Drive Pinion
24. Drive Pinion Rear Bearing Shims
25. Drive Pinion Rear Bearing Cup
26. Drive Pinion Rear Bearing Cone

27. Differential Side Bearing Shim
28. Differential Side Bearing Cup
29. Differential Side Bearing Cone
30. Housing Cover Gasket
31. Housing Cover Bolt Lockwasher
32. Housing Cover Bolt
33. Differential Housing Cover
34. Differential Side Bearing Cap
35. Differential Bearing Cap Bolt
36. Differential Gear
37. Housing Cover Filler Plug
38. Differential Gear Thrust Washer
39. Differential Case
40. Differential Pinion
41. Differential Pinion Thrust Washer
42. Axle Shaft Spacer
43. Differential Pinion Shaft
44. Drive Gear
45. Differential Pinion Shaft Locating Pin
46. Drive Gear Bolts
47. Drive Gear Bolt Lock
48. Wheel Bearing Grease Hole Plug
49. Wheel Bearing Oil Seal Cap Gasket
50. Wheel Bearing Adjusting Cap Bolt
51. Wheel Bearing Adjusting Cap Nut

52. Brake Backing Plate

____________________________________________

Page 6 - TS 78-24

Model	Stand. Trans.	Super-matic	Drive-Master	Overdrive	Hydra-Matic
1948-1949	4.10-1 Std. 4.55-1 Opt	4.10-1 Std. 4.55-1 Opt	4.10-1 Std.	4.55-1 Std. 4.10-1 Opt.	n/a
1950	4.10-1 Std. 4.55-1 Opt. 3.82-1 Opt.	4.55-1 Std. 4.10-1 Opt.	4.10-1 Std. 4.55-1 Opt. 3.82-1 Opt.	4.55-1 Std. 4.10-1 Opt.	n/a
1951	4.10-1 Std. 4.55-1 Opt. 3.58-1 Opt.	4.55-1 Std. 4.10-1 Opt.	4.10-1 Std. 4.55-1 Opt	4.55-1 Std. 4.10-1 Opt.	3.58-1 Only *
1952 (Early)	4.10-1 Std. 4.55-1 Opt. 3.58-1 Opt.			4.55-1 Std. 4.10-1 Opt.	3.58-1 Only
1952 (Late)	4.09-1 Std. 4.55-1 Opt.			4.55-1 Std. 4.09-1 Opt.	3.07-1 Only
1953-1954 (Exc. Jet)	4.09-1 Std. 4.55-1 Opt.			4.55-1 Std. 4.09-1 Opt.	3.54-1 Std. 3.31-1 Opt.
1953-1954 Jet	4.10-1 Std. 4.27-1 Opt. 4.27-1 Opt.			4.27-1 Std. 4.10-1 Opt. 3.54-1 Opt. 3.31-1 Opt.	3.54-1 Std. 3.31-1 Opt.

____________________________________________

TS 78-25 - Drive-Master Service Hints

HUDSON MOTOR CAR COMPANY
DETROIT 14, MICH., U. S. A.

TECHNICAL SERVICE BULLETIN

TS 78-25
File Under: CLUTCH, TRANSMISSION
PROPELLER SHAFT

ALL HUDSON OWNERS, USING DRIVE-MASTER
DRIVE-MASTER SERVICE HINTS

DRIVE-MASTER POWER CYLINDERS MUST BE LUBRICATED. When the power cylinders arc assembled both the felt and the
packing (leather) are well saturated with vacuum cylinder oil and one ounce of vacuum cylinder oil is placed in each cylinder.

Even though the oil is not exposed or there may he no leakage whatsoever, this small amount of oil eventually becomes dissipated.
Dry power cylinders result in sluggish action of clutch release and gear shifting. This is par¬ticularly manifest, in the gear shift power
cylinder, which if dry and slugg¬ish will not complete the shift fully and results it contact failure in the selector switch.

It is recommended that every 10,000 miles one ounce of shock absorber fluid be placed. in each of the power cylinders. The oil may
be injected through the pipe plug opening of the clutch power cylinder. This connection at the rear of the gear shift power cylinder
should be removed for lubrication. If possible the oil should be sprayed in the cylinder so as to be deposited over the entire cylinder
circumference.

Shock absorber fluid may be obtained at speed and racing shops or at a long-established local garage.

DRIVE-MASTER FUSE is of a 1.0 ampere capacity and is located on the back side of the Drive-Master dash switch.

ENGINE IDLE SPEED for Drive--Master equipped cars is 580 to 600 R.P.M.

THE SHIFT STRAP TO POWER. CYLINDER CAP SCREW--480-490 AND 500 SERIES

Referring to all 480-490 and 500 Series, cars fitted with Drive-Master the Shift Strap to power cylinder is secured to the piston
rod by a car screw and star washer.

It is important that this cap screw be kept tight. Erratic shifting and gear clashing will result, should this cap screw become loose:

_____________________________________________

Page 2 - TS 78-25

1. Power unit air intake pipe assembly
2. Power unit vacuum pipe assembly
3. Power unit mounting bracket studs
4. Clutch unit bellcrank bracket assembly
5. Accelerator switch to cross shaft rod
6. Power unit to air cleaner pipe assembly
7. Accelerator switch
8. Clutch power cylinder tension spring
9. Clutch power unit mounting bracket
10. Clutch unit compensator trip lever
11. Clutch unit compensator lever spring
12. Clutch unit solenoid valve assembly
13. Throttle lock solenoid valve assembly
14. Solenoid to power shift pipe assembly
15. Clutch power unit solenoid gasket
16. Vacuum pipe assembly
17. Clutch power unit cylinder assembly
18. Throttle lock diaphragm cylinder assembly
19. Throttle lock solenoid tube assembly
20. Clutch unit compensator lever shaft
21. Clutch power unit piston rod guard
22. Clutch power unit piston rod assembly
23. Clutch unit piston rod pivot bolt
24. Clutch unit piston valve link pin
25. Clutch unit piston valve link
26. Clutch unit piston valve, rod assembly
27. Clutch power unit valve lever bushing
28. Clutch unit bellcrank and compensator assembly
29. Valve lever cam
30. Bellcrank to clutch coupling lever rod
31. Accelerator pedal to bellcrank rod assembly
32. Threaded sleeve rod swivel
33. Threaded sleeve rod assembly
34. Control lever to bellcrank rod ball joint
35. Accelerator pedal link bellcrank stop
36. Accelerator pedal link bellcrank bracket
37. Throttle lock diaphragm rod check nut

38. Bellcrank rod and ball joint assembly
39. Valve lever cam adjusting screw nut
40. Transfer diaphragm solenoids
41. Solenoids to power cylinder tube assembly
42. Power cylinder assembly
43. Transfer diaphragm assembly
44. Power cylinder mounting stud
45. Power cylinder piston guard
46. Transfer diaphragm and rod assembly
47. Transfer rod lock nut
48. Transfer diaphragm engaging rod assembly
49. Transmission control switch assembly
50. Selector switch lever
51. Neutral and limit switch rod assembly
52. Power unit mounting bracket assembly
53. Transfer rod boll joint
54. Transfer key
55. Neutral and limit switch rod lock nut
56. Neutral and limit switch trunnion block
57. Neutral and limit switch rod lock nut
58. Shift shaft transfer key, hub assembly
59. Shift shaft (hand shift) lever assembly
60. Shift rod to power shift lever pin
61. Transmission shift rod assembly
62. Accelerator cross shaft operating rod
63. Valve lever cam adjusting screw
64. Bellcrank to shift shaft lever rod
65. Off-On switch operating rod
66. Accelerator link bellcrank shaft
67. Throttle lock diaphragm rod swivel
68. Cross-over switch rod clip
69. Hand shift bellcrank support
70. Throttle lock cable lock nut
71. Hand shift bellcrank
72. Cross-over switch rod
73. Shift rail switch
74. Governor switch

WTN TECHNICAL SERVICE

Reference:
Hudson Service Merch. Dec '49, Jan, Jul '50
_____________________________________________

TS 80-1 - 1924-1936 Serial Number List

GENERAL TECHNICAL

AND

INFORMATION BULLETIN

TS 80-1
    File Under: SERVICE GENERAL

        October 1980

All Hudson, Essex and Terraplane Owners
1924-1936 Hudson-Built Cars, Year Models by Serial Number

ESSEX AND TERRAPLANE
Year	Serial Number
1924-5-6 Essex 1927 Essex 1928 Essex 1929 Essex 1930 Essex 1931 Essex, 113" Wheelbase 1931 Essex, 11911 Wheelbase 1932 Essex Pacemaker 1932 Terraplane 1933 Terraplane, 106" Wheelbase 1933 Terraplane, 113" Wheelbase 1933 Terraplane 1934 Terraplane, 112" Wheelbase 1934 Terraplane, 116" W[heelbase 1935 Terraplane Special, 112" Wheelbase 1935 Terraplane DeLuxe, 112" Wheelbase 1936 Terraplane DeLuxe, 115" Wheelbase 1936 Terraplane Custom 115" Wheelbase	100000 to 500000 500001 to 706269 706269 to 928658 928658 to 1165674 1165674 to 1234266 1234267 to 1281684 200001 and up 1281685 and up 350000 to 364124 364125 to 372899 5001 to 21495 65001 to 78250 373000 to 416991 21500 to 28593 51-101 to 51-37772 52-101 to 52-11362 61-101 to 61-69752 62-101 to 62-17041
HUDSON
1924-5-6 Hudson 1927 Hudson, 127" Wheelbase 1927 Hudson, 118" Wheelbase 1928 Hudson, 127" Wheelbase 1928 Hudson, 118" Wheelbase 1929 Hudson, 122" Wheelbase 1929 Hudson, 139" Wheelbase 1930 Hudson, 119" Wheelbase, 8 Cylinder 1930 Hudson, 126" Wheelbase, 8 Cylinder 1931 Hudson, 119" Wheelbase, 8 Cylinder 1931 Hudson, 126" Wheelbase, 8 Cylinder 1932 Hudson, 119" Wheelbase, 8 cylinder 1932 Hudson, 126" Wheelbase, 8 cylinder 1932 Hudson, 132" Wheelbase, 8 cylinder 1933 Hudson, Standard 8 1933 Hudson, Major 8 1933 Hudson, Super Six 1934 Hudson 8, 116" Wheelbase 1934 Hudson 8, 123" Wheelbase 1935 Hudson 6, 116" Wheelbase 1935 Hudson 8 Special, 117" Wheelbase 1935 Hudson 8 De Luxe, 117" Wheelbase 1935 Hudson 8 Custom, 124" Wheelbase 1935 Hudson 8 Special, 124" Wheelbase 1935 Hudson 8 De Luxe, 124" Wheelbase 1936 Hudson 6, 120" Wheelbase 1936 Hudson 8 De Luxe, 120" Wheelbase 1936 Hudson 8 Custom, 120" Wheelbase 1936 Hudson 8 De Luxe, 127" Wheelbase 1936 Hudson 8 Custom, 127" Wheelbase	500000 to 750000 750001 to 803568 1000 to 12269 803569 to 825406 12269 to 41383 825407 to 893401 41383 to 46598 893402 to 914292 46599 to 57115 914291 to 930769 57115 to 62883 930770 to 936702 62884 and up 250001 and up 936703 to 938029 251117 to 251600 1300501 to 1301462 950000 to 968679 252000 to 256158 53-101 to 53-7724 54-101 to 54-7250 55-101 to 55-3197 56-101 to 56-1560 57-101 to 57-1068 58-101 to 58- 821 63-101 to 63-9820 64-101 to 64-5456 65-101 to 65-2514 66-101 to 66-3543 67-101 to 67-5004

Source:
January 1937 Hudson-Terraplane Service Magazine

   Serial number information for the 1937 thru 1954 models was published in WTN/HET Technical Service Bulletins
during 1978, as follows:

       1937 Models - TS 78-23, November 1978
       1938 Models - TS 78-17, May 1978
       1939 Models - TS 78-15, March 1978
       1940-1-2 Models - TS 78-6, January 1978
       1946-47 Models - TS 78-9, January 1978
       1948-54 Models - TS 78-14, March 1978
_____________________________________________

GENERAL TECHNICAL

AND

INFORMATION BULLETIN

TS 81-1
File Under: ELECTRICAL
February 1981

ALL HUDSON, ESSEX AND TERRAPLANE OWNERS
CHECK THE STARTER SOLENOID

Reports from the field indicate that in some instances, after many years of service, difficulty is encountered in starting the engine, especially after it warms up. When the starter does not turn the engine over fast enough, it is recommended that the starter solenoid be checked.

The starter solenoid may be tested in the following manner:

1. Connect the negative lead of a voltmeter to battery terminal of starter solenoid switch and the positive lead to the starting motor terminal of the starter solenoid switch, as shown in the illustration (typical 1951-54).

2. Close the solenoid electrically to crank the engine; if the reading is more than 0.2 volts, replace the solenoid switch.

GENERAL TECHNICAL
AND
INFORMATION BULLETIN

TS 81-4
File Under: General Service

June 1981

ALL HUDSON OWNERS
1946-54 Hudson Model Year Production Run
By Serial Number and Month of Manufacture

This information bulletin contains Hudson model year production run figures by serial number and month of manufacture for 1946-54, supplied by Ron Hewitt of Indianapolis, Indiana. He points out that Hudson produced cars on a continuing serial number basis. As each car came off the assembly line it was given the next numerical sequence number regardless of body style or model.
In order to accurately determine when a car was made, one must add the model prefix (481, 491, 7A, 1 C, etc.) to the serial number. Therefore; to aid in this determination, model numbers and names with starting serial numbers are shown for each model year, 1946 through 1954.

HET INFORMATION SERVICE

_____________________________________________

Page 2 - TS 81-4

1946			1947
Serial Number	Month Mfg.	Units Built	Serial Number	Month Mfg.	Units Built
101- 132 None (Strike) 133- 1159 1160- 3343 3344- 5179 5180-10917 10918-16779 16780-24243 None Made 24244-33191 33192-43561 43562-54929 54930-63209 63210-73012 73013-82623 82624-92548 92549-95101 Total	Aug. 1945 Sep. 1945 Oct. 1945 Nov. 1945 Dec. 1945 Jan. 1946 Feb. 1946 Mar. 1946 Apr. 1946 May 1946 Jun. 1946 Jul. 1946 Aug. 1946 Sep. 1946 Oct. 1946 Nov. 1946 Dec. 1946	31 --- 1027 2184 1836 5738 5862 7464 --- 8948 10370 11368 8280 9803 9611 9925 2553 95,000	101- 4491 4492 -15343 15344- 26100 26101- 37413 37414- 47480 47481- 58608 58609- 68699 68700- 80413 80414- 49414 89415- 95101 Total:	Dec. 1946 Jan. 1947 Feb. 1947 Mar. 1947 Apr. 1947 May 1947 Jun. 1947 Jul. 1947 Aug. 1947 Sep. 1947	4390 10852 10757 11313 10067 11128 10091 11714 9001 5687 95,000
Model No.	Model Name	Start. Serial No.	Model No.	Model Name	Start. Serial No.
51 52 53 54 54	Super 6 Commodore 6 Super 8 Commodore 8 Business Cars	31-101 32-101 33-16269 34-16285 38-215	171 172 173 174 178	Super 6 Commodore 6 Super 8 Commodore 8 Business Cars	171-101 172-101 173-101 174-101 175-101
Car Numbering System for 1946 Hudson cars: The first two figures of the car number denote the chassis model, according to the following plan - 31 - denotes Model 51 33 - denotes Model 53 38 - denotes Model 58 32 - denotes Model 52 34 - denotes Model 54 Car Numbers of the 1947 models use the first three figures to denote the chassis model instead of the first two as on previous models. The remaining figures in the car number comprise the actual serial number of the car, and these figures run in a single series, regardless of model. The car number is stamped on a metal plate located on the rear of the right front body pillar, and may be seen by opening the right front door. The engine number, which is the same as the car number, is stamped on the top of the cylinder block, right side, between numbers one and two exhaust ports.

______________________________________________
Page 3 - TS 81-4

1948			1949
Serial Number	Month Mfg.	Units Built	Serial Number	Month Mfg.	Units Built
101-860 861-5023 5024-13282 13283-21238 21239-32374 32375-45032 45033-57029 57030-69696 69697-84119 84120-95687 95688-96217 96218-104327 104328-117301 Total:	Oct. 1947 Nov. 1947 Dec. 1947 Jan. 1948 Feb. 1948 Mar. 1948 Apr. 1948 May 1948 Jun. 1948 Jul. 1948 Aug. 1948 Sep. 1948 Oct. 1948	759 4163 8259 7956 11136 12658 11997 12667 14423 11568 530 8110 12974 117,200	101-2176 2177-20603 20604-39793 39794-57741 57742-72795 72796-87255 87256-101735 101736-112911 112912-124248 124249-133919 133920-145765 145765-156206 156207-159201 Total:	Oct. 1948 Nov. 1948 Dec. 1948 Jan. 1949 Feb. 1949 Mar. 1949 Apr. 1949 May 1949 Jun. 1949 Jul. 1949 Aug. 1949 Sep. 1949 Oct. 1949	2075 18427 19190 17948 15054 14460 14480 1176 11337 9671 11845 10442 2995 159,100
Model No.	Model Name	Start. Serial. No	Model No.	Model Name	Start Serial No.
481 482 483 484	Super 6 Commodore 6 Super 8 Commodore 8	481-101 482-101 483-101 484-101	491 492 493 494	Super 6 Commodore 6 Super 8 Commodore 8	491-101 492-101 493-101 494-101
1950			1951
Serial Number	Month Mfg.	Units Built	Serial Number	Month Mfg.	Units Built
101-127 128-4325 4326-14149 14150-23155 23156-34619 34620-44902 44903-47753 57754-69269 69270-81137 81138-98145 98146-112611 112612-121509 Total:	Sep. 1949 Oct. 1949 Nov. 1949 Dec. 1949 Jan. 1950 Feb. 1950 Mar. 1950 Apr. 1950 May 1950 Jun. 1950 Jul. 1950 Aug. 1950	26 4198 9824 9006 11464 10283 12851 11516 11868 17008 14466 8898 121,408	1001-4950 4951-16357 16358-29401 29402-44902 44903-64687 46488-81377 81378-100191 100192-111664 111665-116933 116934-118144 118145-119452 119453-122517 122518-125964 125956-132915 Total:	Sep. 1950 Oct. 1950 Nov. 1950 Dec. 1950 Jan. 1951 Feb. 1951 Mar. 1951 Apr. 1951 May 1951 Jun. 1951 Jul. 1951 Aug. 1951 Sep. 1951 Oct. 1951	3949 11407 13044 15501 19785 16690 18814 11473 5269 1211 1308 3065 3447 6952 131,915
Model No.	Model Name	Start. Serial No.	Model No.	Model Name	Start Serial No.
500 50A 501 502 503 504	Pacemaker Pacemaker Deluxe Super 6 Commodore 6 Super 8 Commodore 8	500-101 50A-101 501-101 502-101 503-101 504-101	4A 5A 6A 7A 8A	Pacemaker Custom Super 6 Custom Commodore 6 Custom Hornet Commodore 8 Custom	4A-101 5A-101 6A-101 7A-101 8A-101

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Page 4 - TS 81-4

1952			1953
Serial Number	Month Mfg.	Units Built	Serial Number	Month Mfg.	Units Built
132916-133708 133709-138235 138236-145267 145268-152064 152065-160796 160797-167780 167781-173240 173241-179411 179412-186480 186481-192466 192467-199206 199207-202916 Total	Nov. 1951 Dec. 1951 Jan. 1952 Feb. 1952 Mar. 1952 Apr. 1952 May 1952 Jun. 1952 Jul. 1952 Aug. 1952 Sep. 1952 Oct. 1952	792 4527 7032 6797 8732 6984 5460 6171 7069 5986 6740 3710 70,000	202917-208037 208038-214589 214590-221170 221171-229669 229670-239912 239913-251452 254153-259300 259301-265490 205491-269005 269006-269069 Total:	Nov. 1952 Dec. 1952 Jan. 1953 Feb. 1953 Mar. 1953 Apr. 1953 May 1953 Jun. 1953 Jul. 1953 Aug. 1953	5121 6552 6581 8499 10243 11540 7858 6190 3515 54 66,143
Model No.	Model Name	Start Serial No.	Model No.	Model Name	Start Serial No.
4B 5B 6B 7B 8B	Pacemaker Wasp Commodore 6 Hornet Commodore 8	4B-101 5B-101 6B-101 7B-101 8B-101	1C 2C 3C 5C 7C	Jet Super Jet Wasp Super Wasp Hornet	203865 203543 202928 202919 202917
1954			1954
Serial Number	Month Mfg.	Units Built	Model No.	Model Name	Start Serial. No.
269060-272845 272846-278789 278790-282939 282940-288198 288199-291688 291689-293766 293767-295068 295069-298053 298054-299862 299863-302331 302332-306009 306010-308875 308876-312733 312734-316250 316251-319720 Total:	Aug. 1953 Sep. 1953 Oct. 1953 Nov. 1953 Dec. 1953 Jan. 1954 Feb. 1954 Mar. 1954 Apr. 1954 May 1954 Jun. 1954 Jul. 1954 Aug. 1954 Sep. 1954 Oct. 1954	3785 5944 4150 5259 3490 2078 1302 2985 1809 2469 3678 2866 3858 3517 3470 50,660	1D 1D 2D 3D 4D 5D 6D 7D	Jet Jet Family Sedan Super Jet Jet Liner Wasp Super Wasp Hornet Special Hornet	269062 296353 269060 269070 269069 269075 295720 269066
			(AMC registry began 1 May 1954)

______________________________________________

____________________________________________________________________________________________________________________

TS 84-2 - 3x5 Water Distribution Baffle Re-build

GENERAL TECHNICAL
AND
INFORMATION BULLETIN

TS 84-2
File Under: ENGINE

August 1984

Rebuilding the Water Distribution Baffle - Hudson 3x5 Six Cylinder Engine

    Warm weather driving provides a thorough test for the cooling system of any motor vehicle. Once outside temperatures reached the high eighties, the 3 x 5 six in my '47 began exhibiting some disturbing temperature fluctuations. If the vehicle was operated between 50 and 55 mph for sustained periods, the engine temperature would gradually rise to nearly 212 degrees Fahrenheit, although an actual boll-over never occurred. This trend could be reversed by dropping the vehicle speed to about 45 mph whereupon the engine temperature would hover in the 180 to 190 degree region. Unfortunately, this behavior did not inspire much confidence for taking extended trips in this car.

    Initially, I tried the usual remedial steps such as a chemical treatment of the cooling system, a check on the operation of the new 160 degree thermostat, clearing the external radiator fins of debris, checking for collapsing hoses etc., to no avail. After convincing myself that air and coolant flow were probably not the cause of the difficulty, I began to seriously consider possible problems with coolant flow distribution. In my recollection, all of the 3 x 5 Hudson sixes (and the 3 x 4-1/2 eights) built from the early thirties up to 1947 (1952 for eights) employ a pressed steel coolant distribution cover and baffle assembly bolted to the left side of the engine block. The baffle (Fig. 1) is designed to develop adequate coolant flow in all sections of the cylinder block and head.

After removing this assembly from my engine, I noted that a roughly 2 x 3 inch section in the center of the baffle was completely rusted away. Thus, the coolant, taking the path of least resistance, was flowing mainly across the center of the block with reduced flow at the ends. The temperature sensor, being located at the extreme rear end of the cylinder head was, no doubt, detecting this condition. The assembly was obviously in need of replacement. At about this point I discovered that new assemblies for the sixes are nearly impossible to obtain. Moreover, I was not even successful in locating a used unit in better condition than my original. Since the cover pans of my assembly were reasonably intact,, (there were a few pinholes which could be soldered) I decided to construct a new baffle.

First, a few words about the cover removal. The coolant was drained, the generator and connecting hose were taken off. On the 3 x 5 sixes, the cover is secured with 18 5/16-18 cap screws. The 11 cap screw holes on the top and sides of the cover go directly into the water jacket and have the greatest probability of being "frozen" with corrosion products. I found that working the screws back and forth (i.e. alternately tightening and loosening) while applying penetrating oil allowed the removal of all but one of these which did finally did snap off. The bottom seven screws are in "blind" holes and gave little trouble in removal.

Among these lower seven is the pivot shaft for the accelerator linkage which is locked in place by metal tabs bent against the flats on the screw head. These tabs had to be bent away with a small chisel before unfastening the pivot. I was now faced with the prospect of drilling out the broken cap screw. The readers will no doubt appreciate that drilling into the water Jacket must be done with some care if a leak-free result is to be achieved. In my experience, I find that an important part of "drilling out" is locating the center of the broken fastener fairly accurately. In this case, I re-attached the cover to the block with three or four cap screws using three flat washers between the cover and the block. The holes in the cover thus become a "guide" for an 11/32 inch drill bit which was used to indent the broken screw at its center (See Fig 2). i find that a variable speed drill motor gives excellent control for this operation. Having thus located the center, I bored through the broken screw, first with a 1/8 inch bit and then with a 17/64 inch bit, while maintaining the bits as perpendicular as possible to the side of the block. The hole was tapped 5/16-18 in the final step. Returning to the cover-baffle assembly, the original baffle is spot-welded to the cover recess in eight or nine places. Before removing the baffle, I took measurements on the locations and sizes of the baffle holes. The corroded baffle was readily broken away from the cover with a pair of pliers. Accumulated corrosion products were scraped from the inside and the cover held up to a strong light to locate pinholes. Pinholes were enlarged to reach solid metal and closed off from the outside using 50/50 solder and an acid flux. A few of the larger holes required small plates of 22 gauge steel soldered in place to cover them adequately. The cover was leak-checked by closing the coolant inlet tube with a cork, positioning the cover horizontally and filling it with a 50/50 antifreeze-water solution.

    I had two options for reconstructing the baffle. I could either replicate the original baffle and have it spot-welded into the cover recess or I could construct a full-sized unit to be interposed between the block and the cover as shown in Figure 3. The corroded condition of the baffle recess led me to doubt that good spot welds could be achieved. Thus, I settled for the second option. The cover itself was used as a template for tracing the baffle outline and screw holes on a piece of 18 gage mild steel. Due to the electrochemical nature of corrosion in automotive cooling systems I would caution against using a more corrosion-resistant material such as stainless steel for the baffle. While such a baffle will be long-lived, it may serve to intensify corrosion in other parts of the cooling system, particularly in the cover itself With the use of modem corrosion inhibitors, a mild steel baffle will probably last twenty years or more.

    The appropriate coolant flow holes were cut into the new baffle and an air bleed slot (to assure that the cover fills completely with coolant) formed by cutting away the metal between a series of closely spaced 3/32 inch holes according to the dimensions shown in Figure 3. Prior to the installation of this rebuilt assembly, I used high-pressure water in the block opening to flush all loose scale and other debris from the engine block. The new baffle was "sandwiched" between the block and cover and sealed with two 1/32 inch velurnoid gaskets coated with Permatex Aviation Cement. The cap screw threads were also coated with this cement to prevent coolant seepage and reduce the probability or "frozen" screws in the future. The cap screws were torqued to 12 foot-pounds.

    Since the new baffle has been installed, the temperature fluctuation problem has been essentially eliminated even when ambient temperatures approached 100 degrees. If the gasket cement is carefully applied, the interposed baffle plate is barely noticeable. After about 300 miles of driving, the cap screws were retorqued.

NOTE: Measurements should be checked with an original baffle plate - measurements given here were taken
from a poor copy, and tho every effort has been made to get them correct, there is the possiblity that
one or more may be incorrect.

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